# by Martin Prout

require 'cf3'

def setup_the_dragon
  @dragon = ContextFree.define do

    shape :start do
      dragon alpha: 1
    end

    shape :dragon do
      square hue: 0, brightness: 0, saturation: 1, alpha: 0.02
      split do
        dragon size: 1/Math.sqrt(2), rotation: -45, x: 0.25, y: 0.25
        rewind
        dragon size: 1/Math.sqrt(2), rotation: 135, x: 0.25, y: 0.25
        rewind
      end
    end

  end
end

def setup
  size 800, 500
  setup_the_dragon
  smooth
  draw_it
end

def draw
  # Do nothing.
end

def draw_it
  background 255
  @dragon.render :start, size: width*0.8,  stop_size: 2,
                         start_x: width/3, start_y: height/3.5
end