lake bogoria
import turtle
import math
import colorsys
phi = 180 * (3 - math.sqrt(5))
t = turtle.Pen()
t.speed(0)
def square(t, size):
for tmp in range(0,4):
t.forward(size)
t.right(90)
num = 200
for x in reversed(range(0, num)):
t.fillcolor(colorsys.hsv_to_rgb(x/num, 1.0, 1.0))
t.begin_fill()
t.circle(5 + x, None, 11)
square(t, 5 + x)
t.end_fill()
t.right(phi)
t.right(.8)
turtle.mainloop()