import turtle
import math
def xt(t):
  return 16 * math.sin(t) ** 3

def yt(t): 
  return 13 * math.cos(t) - 5 *\
							math.cos(2 * t) - 2 *\
  						math.cos (3 * t) - \
    					math.cos (4 * t)
      
t = turtle.Turtle()
t.speed (500)
turtle.colormode(255)
turtle.Screen().bgcolor(0,0,0)
for i in range (2550):
  t.goto((xt(i) * 20, yt(i) * 20))
  t.pencolor((255-i) % 255, i % 255, 255)
  t.goto(0,0)
  
  t.hideturtle()
  turtle.update()
  turtle.mainloop()