FractalTree.ipynb

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   "cells": [
    {
     "metadata": {},
     "cell_type": "heading",
     "source": "Draw a tree with turtle",
     "level": 1
    },
    {
     "metadata": {},
     "cell_type": "code",
     "input": "import turtle\nimport random\n\nfinished = []\n\ndef draw_leaves():\n    for turtle in finished:\n        for i in range(20):\n            turtle.begin_fill()\n            rand = random.randint(-16, 16)\n            turtle.color((16 + rand, 128 + rand, 16 + rand))\n            turtle.circle(random.randint(4, 8), steps=5)\n            turtle.left(36)\n            turtle.penup()\n            turtle.forward(random.randint(8, 20))\n            turtle.pendown()\n            turtle.end_fill()\n\ndef draw_branch(turtle, level=12):\n    if level > 0:\n        turtle.pensize(level)\n        clone = turtle.clone()\n\n        turtle.left(random.randint(1, 20))\n        turtle.forward(random.randint(2, 8) * level)\n        draw_branch(turtle, level-random.randint(1,3))\n\n        clone.right(random.randint(1, 20))\n        clone.forward(random.randint(2, 8) * level)\n        draw_branch(clone, level-random.randint(1,3))\n    else:\n        turtle.pensize(1)\n        finished.append(turtle)\n\ndef draw():\n    turtle.setup(800, 600)\n    turtle.colormode(255)\n    turtle.bgcolor(\"white\")\n    turtle.pensize(13)\n    turtle.color(\"brown\")\n    turtle.speed(10000000)\n    turtle.hideturtle()\n\n    turtle.penup()\n    turtle.right(90)\n    turtle.forward(300)\n\n    turtle.pendown()\n    turtle.right(180)\n    turtle.forward(250)\n    draw_branch(turtle)\n    draw_leaves()\n\ndraw()",
     "outputs": [],
     "language": "python",
     "trusted": true,
     "collapsed": false
    },
    {
     "metadata": {},
     "cell_type": "code",
     "input": "",
     "outputs": [],
     "language": "python",
     "trusted": true,
     "collapsed": false
    }
   ],
   "metadata": {}
  }
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