Draw circles on canvas

draw-circles.coffee

{requestInterval, clearRequestInterval} = require './animation-helpers'

NUM_CIRCLES = 2500
MAX_RADIUS = 80
MIN_RADIUS = 4

bgCanvas = document.getElementById "bg"
fgCanvas = document.getElementById "fg"
bg = bgCanvas.getContext "2d"
fg = fgCanvas.getContext "2d"

width  = bgCanvas.width  = fgCanvas.width  = window.innerWidth
height = bgCanvas.height = fgCanvas.height = window.innerHeight

rand = (lower, upper) -> lower + Math.floor Math.random() * upper
dr = (i) -> .4 * Math.pow 1.5, i

class Circle
  constructor: (@radius = MIN_RADIUS) ->
    @x = rand 0, width
    @y = rand 0, height
    @color = if rand(0, 2) then '#ff0000' else '#0000ff'

circles = (new Circle for c in [0..NUM_CIRCLES])
activeCircles = []

animate = ->
  fg.clearRect 0, 0, width, height
  drawCircle fg, circle for circle in activeCircles
  return

drawCircle = (ctx, circle) ->
  ctx.beginPath()
  ctx.arc circle.x, circle.y, circle.radius, 0, Math.PI * 2, true
  ctx.lineWidth = 5

  # line color
  if circle.radius == MIN_RADIUS
    ctx.fillStyle = circle.color
    ctx.fill()
  else
    ctx.strokeStyle = circle.color
    ctx.stroke()
  ctx.closePath()

addCircle = ->
  circle = new Circle MAX_RADIUS
  activeCircles.push circle

  iterations = 0

  shrinkRadius = ->
    iterations++
    circle.radius -= dr iterations

    if circle.radius < 0
      clearRequestInterval newCircleInterval
      circle.radius = MIN_RADIUS
      # when done animating, draw it to the background canvas
      ## activeCircles.splice activeCircles.indexOf(circle), 1
      drawCircle bg, circle
      circles.push circle

  newCircleInterval = requestInterval shrinkRadius, 20

# initialize the background canvas with original circles
drawCircle bg, circle for circle in circles

requestInterval animate, 20
requestInterval addCircle, 1500

draw-circles.js

!function(n){function t(i){if(e[i])return e[i].exports;var o=e[i]={exports:{},id:i,loaded:!1};return n[i].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var e={};return t.m=n,t.c=e,t.p="public/",t(0)}([function(n,t,e){var i,o,r,a,u,c,l,d,w,f,s,m,h,v,p,g,q,A,F,y,x,I,R,b;for(b=e(1),y=b.requestInterval,h=b.clearRequestInterval,a=2500,o=80,r=4,w=document.getElementById("bg"),q=document.getElementById("fg"),d=w.getContext("2d"),g=q.getContext("2d"),x=w.width=q.width=window.innerWidth,A=w.height=q.height=window.innerHeight,F=function(n,t){return n+Math.floor(Math.random()*t)},v=function(n){return.4*Math.pow(1.5,n)},i=function(){function n(n){this.radius=null!=n?n:r,this.x=F(0,x),this.y=F(0,A),this.color=F(0,2)?"#ff0000":"#0000ff"}return n}(),m=function(){var n,t;for(t=[],f=n=0;a>=0?a>=n:n>=a;f=a>=0?++n:--n)t.push(new i);return t}(),u=[],l=function(){var n,t,e;for(g.clearRect(0,0,x,A),t=0,e=u.length;e>t;t++)n=u[t],p(g,n)},p=function(n,t){return n.beginPath(),n.arc(t.x,t.y,t.radius,0,2*Math.PI,!0),n.lineWidth=5,t.radius===r?(n.fillStyle=t.color,n.fill()):(n.strokeStyle=t.color,n.stroke()),n.closePath()},c=function(){var n,t,e,a;return n=new i(o),u.push(n),t=0,a=function(){return t++,n.radius-=v(t),n.radius<0?(h(e),n.radius=r,p(d,n),m.push(n)):void 0},e=y(a,20)},I=0,R=m.length;R>I;I++)s=m[I],p(d,s);y(l,20),y(c,1500)},function(n,t){t.requestInterval=function(n,t){var e,i,o,r;return r=Date.now(),i=function(){var e,a,u;e=Date.now(),a=e-r,a>=t&&(n(),r=Date.now()),u=o(i)},o=function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame}(),o?e=o(i):setInterval(n,t)},t.clearRequestInterval=function(n){("function"==typeof window.cancelAnimationFrame?window.cancelAnimationFrame(n):void 0)||("function"==typeof window.webkitCancelAnimationFrame?window.webkitCancelAnimationFrame(n):void 0)||("function"==typeof window.webkitCancelRequestAnimationFrame?window.webkitCancelRequestAnimationFrame(n):void 0)||("function"==typeof window.mozCancelRequestAnimationFrame?window.mozCancelRequestAnimationFrame(n):void 0)||clearInterval(n)}}]);
/*
//@ sourceMappingURL=data:application/json;base64,{"version":3,"file":"circle-test.js","sources":["circle-test.js","webpack/bootstrap 8a4b268663a176dff6f3","./app/js/circle-test.coffee","./app/js/circle-test.coffee*","./app/js/animation-helpers.coffee","./app/js/animation-helpers.coffee*"],"names":["modules","__webpack_require__","moduleId","installedModules","exports","module","id","loaded","call","m","c","p","Circle","MAX_RADIUS","MIN_RADIUS","NUM_CIRCLES","activeCircles","addCircle","animate","bg","bgCanvas","circle","circles","clearRequestInterval","dr","drawCircle","fg","fgCanvas","height","rand","requestInterval","width","_i","_len","_ref","document","getElementById","getContext","window","innerWidth","innerHeight","lower","upper","Math","floor","random","i","pow","radius","this","x","y","color","_results","push","clearRect","length","ctx","beginPath","arc","PI","lineWidth","fillStyle","fill","strokeStyle","stroke","closePath","iterations","newCircleInterval","shrinkRadius","fn","delay","interval","later","requestAnimFrame","start","Date","now","current","delta","requestAnimationFrame","webkitRequestAnimationFrame","mozRequestAnimationFrame","setInterval","handle","cancelAnimationFrame","webkitCancelAnimationFrame","webkitCancelRequestAnimationFrame","mozCancelRequestAnimationFrame","clearInterval"],"mappings":"CAAS,SAAUA,GCKnB,QAAAC,GAAAC,GAEA,GAAAC,EAAAD,GACA,MAAAC,GAAAD,GAAAE,OAGA,IAAAC,GAAAF,EAAAD,IACAE,WACAE,GAAAJ,EACAK,QAAA,EAUA,OANAP,GAAAE,GAAAM,KAAAH,EAAAD,QAAAC,IAAAD,QAAAH,GAGAI,EAAAE,QAAA,EAGAF,EAAAD,QAtBA,GAAAD,KAqCA,OAVAF,GAAAQ,EAAAT,EAGAC,EAAAS,EAAAP,EAGAF,EAAAU,EAAA,UAIAV,EAAA,KDMM,SAASI,EAAQD,EAASH,GE7ChC,GAAAW,GAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAV,EAAAW,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,EAAAC,CAkEA,KAlEAA,EAAAjC,EAAA,GAAA6B,EAAAI,EAAAJ,gBAAAP,EAAAW,EAAAX,qBAAAR,EAAA,KAAAF,EAAA,GAAAC,EAAA,EAAAM,EAAAe,SAAAC,eAAA,MAAAT,EAAAQ,SAAAC,eAAA,MAAAjB,EAAAC,EAAAiB,WAAA,MAAAX,EAAAC,EAAAU,WAAA,MAAAN,EAAAX,EAAAW,MAAAJ,EAAAI,MAAAO,OAAAC,WAAAX,EAAAR,EAAAQ,OAAAD,EAAAC,OAAAU,OAAAE,YAAAX,EAAA,SAAAY,EAAAC,GCuBA,MAAAD,GAAAE,KAAAC,MAAAD,KAAAE,SAAAH,IDvBAlB,EAAA,SAAAsB,GC2BA,SAAAH,KAAAI,IAAA,IAAAD,ID3BAlC,EAAA,WAkBe,QAAAA,GAAAoC,GACXC,KAAAD,OAAA,MAAAA,IAAAlC,EAAAmC,KAAAC,EAAArB,EAAA,EAAAE,GAAAkB,KAAAE,EAAAtB,EAAA,EAAAD,GAAAqB,KAAAG,MAAAvB,EAAA,yBCmBJ,MAAAjB,MDtCAU,EAAA,WC2CA,GAAAU,GAAAqB,CAEA,KDtBWA,KCsBX3C,EAAAsB,EAAA,EDtB+BjB,GAAA,EAAAA,GAAAiB,KAAAjB,EAAAL,EAAAK,GAAA,IAAAiB,MAApBqB,EAAAC,KAAA,GAAA1C,GCyBX,OAAAyC,MDhDArC,KAAAE,EAAA,WA2BE,GAAAG,GAAAW,EAAAC,CACA,KADAP,EAAA6B,UAAA,IAAAxB,EAAAH,GACAI,EAAA,EAAAC,EAAAjB,EAAAwC,OAAAvB,EAAAD,MC6BFX,EAAAL,EAAAgB,GD7BEP,EAAAC,EAAAL,IA5BFI,EAAA,SAAAgC,EAAApC,GCyEA,MDzCEoC,GAAAC,YAAAD,EAAAE,IAAAtC,EAAA6B,EAAA7B,EAAA8B,EAAA9B,EAAA2B,OAAA,IAAAL,KAAAiB,IAAA,GAAAH,EAAAI,UAAA,EAKAxC,EAAA2B,SAAAlC,GACE2C,EAAAK,UAAAzC,EAAA+B,MAAAK,EAAAM,SAGAN,EAAAO,YAAA3C,EAAA+B,MAAAK,EAAAQ,UCgCJR,EAAAS,aDzEAjD,EAAA,WA8CE,GAAAI,GAAA8C,EAAAC,EAAAC,CC6CF,OD7CEhD,GAAA,GAAAT,GAAAC,GAAAG,EAAAsC,KAAAjC,GAAA8C,EAAA,EAAAE,EAAA,WASE,MAHAF,KAAA9C,EAAA2B,QAAAxB,EAAA2C,GAGA9C,EAAA2B,OAAA,GACEzB,EAAA6C,GAAA/C,EAAA2B,OAAAlC,EAAAW,EAAAN,EAAAE,GCgCNC,EAAAgC,KAAAjC,IDjCI,QCoCJ+C,EAAAtC,EAAAuC,EAAA,KDzBArC,EAAA,EAAAC,EAAAX,EAAAkC,OAAAvB,EAAAD,MC6BAX,EAAAC,EAAAU,GD7BAP,EAAAN,EAAAE,EAlEAS,GAAAZ,EAAA,IAAAY,EAAAb,EAAA,OFyJM,SAASZ,EAAQD,GIzJvBA,EAAA0B,gBAAA,SAAAwC,EAAAC,GACE,GAAAC,GAAAC,EAAAC,EAAAC,CAYA,OAZAA,GAAAC,KAAAC,MAAAJ,EAAA,WAEE,GAAAK,GAAAC,EAAAP,CAAAM,GAAAF,KAAAC,MAAAE,EAAAD,EAAAH,EAEAI,GAAAR,IACED,IAAAK,EAAAC,KAAAC,OAHFL,EAAAE,EAAAD,IAFFC,EAAA,WCaF,MAAApC,QAAA0C,uBAAA1C,OAAA2C,6BAAA3C,OAAA4C,4BDDER,ECMFF,EAAAE,EAAAD,GDNEU,YAAAb,EAAAC,IAbFnE,EAAAmB,qBAAA,SAAA6D,IAkBE,kBAAA9C,QAAA+C,qBAAA/C,OAAA+C,qBAAAD,GAAA,4BAAA9C,QAAAgD,2BAAAhD,OAAAgD,2BAAAF,GAAA,4BAAA9C,QAAAiD,kCAAAjD,OAAAiD,kCAAAH,GAAA,4BAAA9C,QAAAkD,+BAAAlD,OAAAkD,+BAAAJ,GAAA,SAAAK,cAAAL","sourcesContent":["/******/ (function(modules) { // webpackBootstrap\n/******/ \t\n/******/ \t// The module cache\n/******/ \tvar installedModules = {};\n/******/ \t\n/******/ \t// The require function\n/******/ \tfunction __webpack_require__(moduleId) {\n/******/ \t\t// Check if module is in cache\n/******/ \t\tif(installedModules[moduleId])\n/******/ \t\t\treturn installedModules[moduleId].exports;\n/******/ \t\t\n/******/ \t\t// Create a new module (and put it into the cache)\n/******/ \t\tvar module = installedModules[moduleId] = {\n/******/ \t\t\texports: {},\n/******/ \t\t\tid: moduleId,\n/******/ \t\t\tloaded: false\n/******/ \t\t};\n/******/ \t\t\n/******/ \t\t// Execute the module function\n/******/ \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n/******/ \t\t\n/******/ \t\t// Flag the module as loaded\n/******/ \t\tmodule.loaded = true;\n/******/ \t\t\n/******/ \t\t// Return the exports of the module\n/******/ \t\treturn module.exports;\n/******/ \t}\n/******/ \t\n/******/ \t\n/******/ \t// expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n/******/ \t\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n/******/ \t\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"public/\";\n/******/ \t\n/******/ \t\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(0);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ function(module, exports, __webpack_require__) {\n\n\tvar Circle, MAX_RADIUS, MIN_RADIUS, NUM_CIRCLES, activeCircles, addCircle, animate, bg, bgCanvas, c, circle, circles, clearRequestInterval, dr, drawCircle, fg, fgCanvas, height, rand, requestInterval, width, _i, _len, _ref;\n\t\n\t_ref = __webpack_require__(1), requestInterval = _ref.requestInterval, clearRequestInterval = _ref.clearRequestInterval;\n\t\n\tNUM_CIRCLES = 2500;\n\t\n\tMAX_RADIUS = 80;\n\t\n\tMIN_RADIUS = 4;\n\t\n\tbgCanvas = document.getElementById(\"bg\");\n\t\n\tfgCanvas = document.getElementById(\"fg\");\n\t\n\tbg = bgCanvas.getContext(\"2d\");\n\t\n\tfg = fgCanvas.getContext(\"2d\");\n\t\n\twidth = bgCanvas.width = fgCanvas.width = window.innerWidth;\n\t\n\theight = bgCanvas.height = fgCanvas.height = window.innerHeight;\n\t\n\trand = function(lower, upper) {\n\t  return lower + Math.floor(Math.random() * upper);\n\t};\n\t\n\tdr = function(i) {\n\t  return .4 * Math.pow(1.5, i);\n\t};\n\t\n\tCircle = (function() {\n\t  function Circle(radius) {\n\t    this.radius = radius != null ? radius : MIN_RADIUS;\n\t    this.x = rand(0, width);\n\t    this.y = rand(0, height);\n\t    this.color = rand(0, 2) ? '#ff0000' : '#0000ff';\n\t  }\n\t\n\t  return Circle;\n\t\n\t})();\n\t\n\tcircles = (function() {\n\t  var _i, _results;\n\t  _results = [];\n\t  for (c = _i = 0; 0 <= NUM_CIRCLES ? _i <= NUM_CIRCLES : _i >= NUM_CIRCLES; c = 0 <= NUM_CIRCLES ? ++_i : --_i) {\n\t    _results.push(new Circle);\n\t  }\n\t  return _results;\n\t})();\n\t\n\tactiveCircles = [];\n\t\n\tanimate = function() {\n\t  var circle, _i, _len;\n\t  fg.clearRect(0, 0, width, height);\n\t  for (_i = 0, _len = activeCircles.length; _i < _len; _i++) {\n\t    circle = activeCircles[_i];\n\t    drawCircle(fg, circle);\n\t  }\n\t};\n\t\n\tdrawCircle = function(ctx, circle) {\n\t  ctx.beginPath();\n\t  ctx.arc(circle.x, circle.y, circle.radius, 0, Math.PI * 2, true);\n\t  ctx.lineWidth = 5;\n\t  if (circle.radius === MIN_RADIUS) {\n\t    ctx.fillStyle = circle.color;\n\t    ctx.fill();\n\t  } else {\n\t    ctx.strokeStyle = circle.color;\n\t    ctx.stroke();\n\t  }\n\t  return ctx.closePath();\n\t};\n\t\n\taddCircle = function() {\n\t  var circle, iterations, newCircleInterval, shrinkRadius;\n\t  circle = new Circle(MAX_RADIUS);\n\t  activeCircles.push(circle);\n\t  iterations = 0;\n\t  shrinkRadius = function() {\n\t    iterations++;\n\t    circle.radius -= dr(iterations);\n\t    if (circle.radius < 0) {\n\t      clearRequestInterval(newCircleInterval);\n\t      circle.radius = MIN_RADIUS;\n\t      drawCircle(bg, circle);\n\t      return circles.push(circle);\n\t    }\n\t  };\n\t  return newCircleInterval = requestInterval(shrinkRadius, 20);\n\t};\n\t\n\tfor (_i = 0, _len = circles.length; _i < _len; _i++) {\n\t  circle = circles[_i];\n\t  drawCircle(bg, circle);\n\t}\n\t\n\trequestInterval(animate, 20);\n\t\n\trequestInterval(addCircle, 1500);\n\n\n/***/ },\n/* 1 */\n/***/ function(module, exports, __webpack_require__) {\n\n\texports.requestInterval = function(fn, delay) {\n\t  var interval, later, requestAnimFrame, start;\n\t  start = Date.now();\n\t  later = function() {\n\t    var current, delta, interval;\n\t    current = Date.now();\n\t    delta = current - start;\n\t    if (delta >= delay) {\n\t      fn();\n\t      start = Date.now();\n\t    }\n\t    interval = requestAnimFrame(later);\n\t  };\n\t  requestAnimFrame = (function() {\n\t    return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;\n\t  })();\n\t  if (!requestAnimFrame) {\n\t    return setInterval(fn, delay);\n\t  }\n\t  return interval = requestAnimFrame(later);\n\t};\n\t\n\texports.clearRequestInterval = function(handle) {\n\t  (typeof window.cancelAnimationFrame === \"function\" ? window.cancelAnimationFrame(handle) : void 0) || (typeof window.webkitCancelAnimationFrame === \"function\" ? window.webkitCancelAnimationFrame(handle) : void 0) || (typeof window.webkitCancelRequestAnimationFrame === \"function\" ? window.webkitCancelRequestAnimationFrame(handle) : void 0) || (typeof window.mozCancelRequestAnimationFrame === \"function\" ? window.mozCancelRequestAnimationFrame(handle) : void 0) || clearInterval(handle);\n\t};\n\n\n/***/ }\n/******/ ])","\n// The module cache\nvar installedModules = {};\n\n// The require function\nfunction __webpack_require__(moduleId) {\n\t// Check if module is in cache\n\tif(installedModules[moduleId])\n\t\treturn installedModules[moduleId].exports;\n\t\n\t// Create a new module (and put it into the cache)\n\tvar module = installedModules[moduleId] = {\n\t\texports: {},\n\t\tid: moduleId,\n\t\tloaded: false\n\t};\n\t\n\t// Execute the module function\n\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\t\n\t// Flag the module as loaded\n\tmodule.loaded = true;\n\t\n\t// Return the exports of the module\n\treturn module.exports;\n}\n\n\n// expose the modules object (__webpack_modules__)\n__webpack_require__.m = modules;\n\n// expose the module cache\n__webpack_require__.c = installedModules;\n\n// __webpack_public_path__\n__webpack_require__.p = \"public/\";\n\n\n// Load entry module and return exports\nreturn __webpack_require__(0);","{requestInterval, clearRequestInterval} = require './animation-helpers'\n\nNUM_CIRCLES = 2500\nMAX_RADIUS = 80\nMIN_RADIUS = 4\n\nbgCanvas = document.getElementById \"bg\"\nfgCanvas = document.getElementById \"fg\"\nbg = bgCanvas.getContext \"2d\"\nfg = fgCanvas.getContext \"2d\"\n\nwidth  = bgCanvas.width  = fgCanvas.width  = window.innerWidth\nheight = bgCanvas.height = fgCanvas.height = window.innerHeight\n\nrand = (lower, upper) -> lower + Math.floor Math.random() * upper\ndr = (i) -> .4 * Math.pow 1.5, i\n\nclass Circle\n  constructor: (@radius = MIN_RADIUS) ->\n    @x = rand 0, width\n    @y = rand 0, height\n    @color = if rand(0, 2) then '#ff0000' else '#0000ff'\n\ncircles = (new Circle for c in [0..NUM_CIRCLES])\nactiveCircles = []\n\nanimate = ->\n  fg.clearRect 0, 0, width, height\n  drawCircle fg, circle for circle in activeCircles\n  return\n\ndrawCircle = (ctx, circle) ->\n  ctx.beginPath()\n  ctx.arc circle.x, circle.y, circle.radius, 0, Math.PI * 2, true\n  ctx.lineWidth = 5\n\n  # line color\n  if circle.radius == MIN_RADIUS\n    ctx.fillStyle = circle.color\n    ctx.fill()\n  else\n    ctx.strokeStyle = circle.color\n    ctx.stroke()\n  ctx.closePath()\n\naddCircle = ->\n  circle = new Circle MAX_RADIUS\n  activeCircles.push circle\n\n  iterations = 0\n\n  shrinkRadius = ->\n    iterations++\n    circle.radius -= dr iterations\n\n    if circle.radius < 0\n      clearRequestInterval newCircleInterval\n      circle.radius = MIN_RADIUS\n      # when done animating, draw it to the background canvas\n      ## activeCircles.splice activeCircles.indexOf(circle), 1\n      drawCircle bg, circle\n      circles.push circle\n\n  newCircleInterval = requestInterval shrinkRadius, 20\n\n# initialize the background canvas with original circles\ndrawCircle bg, circle for circle in circles\n\nrequestInterval animate, 20\nrequestInterval addCircle, 1500\n","var Circle, MAX_RADIUS, MIN_RADIUS, NUM_CIRCLES, activeCircles, addCircle, animate, bg, bgCanvas, c, circle, circles, clearRequestInterval, dr, drawCircle, fg, fgCanvas, height, rand, requestInterval, width, _i, _len, _ref;\n\n_ref = require('./animation-helpers'), requestInterval = _ref.requestInterval, clearRequestInterval = _ref.clearRequestInterval;\n\nNUM_CIRCLES = 2500;\n\nMAX_RADIUS = 80;\n\nMIN_RADIUS = 4;\n\nbgCanvas = document.getElementById(\"bg\");\n\nfgCanvas = document.getElementById(\"fg\");\n\nbg = bgCanvas.getContext(\"2d\");\n\nfg = fgCanvas.getContext(\"2d\");\n\nwidth = bgCanvas.width = fgCanvas.width = window.innerWidth;\n\nheight = bgCanvas.height = fgCanvas.height = window.innerHeight;\n\nrand = function(lower, upper) {\n  return lower + Math.floor(Math.random() * upper);\n};\n\ndr = function(i) {\n  return .4 * Math.pow(1.5, i);\n};\n\nCircle = (function() {\n  function Circle(radius) {\n    this.radius = radius != null ? radius : MIN_RADIUS;\n    this.x = rand(0, width);\n    this.y = rand(0, height);\n    this.color = rand(0, 2) ? '#ff0000' : '#0000ff';\n  }\n\n  return Circle;\n\n})();\n\ncircles = (function() {\n  var _i, _results;\n  _results = [];\n  for (c = _i = 0; 0 <= NUM_CIRCLES ? _i <= NUM_CIRCLES : _i >= NUM_CIRCLES; c = 0 <= NUM_CIRCLES ? ++_i : --_i) {\n    _results.push(new Circle);\n  }\n  return _results;\n})();\n\nactiveCircles = [];\n\nanimate = function() {\n  var circle, _i, _len;\n  fg.clearRect(0, 0, width, height);\n  for (_i = 0, _len = activeCircles.length; _i < _len; _i++) {\n    circle = activeCircles[_i];\n    drawCircle(fg, circle);\n  }\n};\n\ndrawCircle = function(ctx, circle) {\n  ctx.beginPath();\n  ctx.arc(circle.x, circle.y, circle.radius, 0, Math.PI * 2, true);\n  ctx.lineWidth = 5;\n  if (circle.radius === MIN_RADIUS) {\n    ctx.fillStyle = circle.color;\n    ctx.fill();\n  } else {\n    ctx.strokeStyle = circle.color;\n    ctx.stroke();\n  }\n  return ctx.closePath();\n};\n\naddCircle = function() {\n  var circle, iterations, newCircleInterval, shrinkRadius;\n  circle = new Circle(MAX_RADIUS);\n  activeCircles.push(circle);\n  iterations = 0;\n  shrinkRadius = function() {\n    iterations++;\n    circle.radius -= dr(iterations);\n    if (circle.radius < 0) {\n      clearRequestInterval(newCircleInterval);\n      circle.radius = MIN_RADIUS;\n      drawCircle(bg, circle);\n      return circles.push(circle);\n    }\n  };\n  return newCircleInterval = requestInterval(shrinkRadius, 20);\n};\n\nfor (_i = 0, _len = circles.length; _i < _len; _i++) {\n  circle = circles[_i];\n  drawCircle(bg, circle);\n}\n\nrequestInterval(animate, 20);\n\nrequestInterval(addCircle, 1500);\n","exports.requestInterval = (fn, delay) ->\n  start = Date.now()\n  later = ->\n    current = Date.now()\n    delta = current - start\n    if delta >= delay\n      fn()\n      start = Date.now()\n    interval = requestAnimFrame later\n    return\n  requestAnimFrame = do ->\n    window.requestAnimationFrame or window.webkitRequestAnimationFrame or window.mozRequestAnimationFrame\n\n  return setInterval(fn, delay) unless requestAnimFrame\n  interval = requestAnimFrame later\n\n\nexports.clearRequestInterval = (handle) ->\n  window.cancelAnimationFrame?(handle) or\n  window.webkitCancelAnimationFrame?(handle) or\n  window.webkitCancelRequestAnimationFrame?(handle) or\n  window.mozCancelRequestAnimationFrame?(handle) or\n  clearInterval(handle)\n  return","exports.requestInterval = function(fn, delay) {\n  var interval, later, requestAnimFrame, start;\n  start = Date.now();\n  later = function() {\n    var current, delta, interval;\n    current = Date.now();\n    delta = current - start;\n    if (delta >= delay) {\n      fn();\n      start = Date.now();\n    }\n    interval = requestAnimFrame(later);\n  };\n  requestAnimFrame = (function() {\n    return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;\n  })();\n  if (!requestAnimFrame) {\n    return setInterval(fn, delay);\n  }\n  return interval = requestAnimFrame(later);\n};\n\nexports.clearRequestInterval = function(handle) {\n  (typeof window.cancelAnimationFrame === \"function\" ? window.cancelAnimationFrame(handle) : void 0) || (typeof window.webkitCancelAnimationFrame === \"function\" ? window.webkitCancelAnimationFrame(handle) : void 0) || (typeof window.webkitCancelRequestAnimationFrame === \"function\" ? window.webkitCancelRequestAnimationFrame(handle) : void 0) || (typeof window.mozCancelRequestAnimationFrame === \"function\" ? window.mozCancelRequestAnimationFrame(handle) : void 0) || clearInterval(handle);\n};\n"],"sourceRoot":"webpack-module://"}
*/

index.html

<html>
  <head>
  </head>
  <body>
    <canvas id="bg" style="position: absolute; z-index: 0"></canvas>
    <canvas id="fg" style="position: absolute; z-index: 1"></canvas>
    <script src="draw-circles.js"></script>
  </body>
</html>