balls.p8

pico-8 cartridge // http://www.pico-8.com
version 4
__lua__

pallete       = {1, 13, 12, 6, 7}
ellipse_rad_x = 30
ellipse_rad_y = 10
velocity      = 0
gravity       = 0.98
posy          = 1

function _draw()
  cls()

  -- bounce
  velocity += gravity
  posy += flr(velocity)
  if posy >= 76 then
    velocity *= -1
  end

  -- draw circles
  local i
  local a=time()*0.2
  for i=0,0.8,0.2 do
    local x = ellipse_rad_x*cos(a+i)
    local y = ellipse_rad_y*sin(a+i)
    local radius = ((y +10) / 20) * 10
    local col = ceil((i*5)+1) -- wtf do i need to use ceil here?
    circfill(x+64, y+posy, radius, pallete[col])
  end
end