Square_pattern.py

import turtle
t = turtle.Turtle()

s = turtle.Screen()
s.bgcolor("black")
t.pencolor("white")
t.speed(0)
c = 0
while 1:
	for i in range(4):
		t.forward(250)
		t.right(90)
	t.right(3)
	c += 1
	if c>= 360/3:
		break

t.hideturtle()
turtle.done()