def spiral(size: Int, angle: Int) {
if (size <= 300) {
forward(size)
right(angle)
spiral(size + 2, angle)
}
}
clear()
setPenColor(darkGray)
setFillColor(green)
setBackgroundH(red, yellow)
setPenThickness(1)
setSpeed(superFast)
spiral(0, 91)