save project

star.py

 import turtle
 import turtle
 pen=turtle.Pen()
 pen=turtle.Pen()
-pen.speed(10)
-len=1
+screen=turtle.Screen()
+pen.speed(15)
+screen.bgcolor("black")
+color=["red","orange","yellow","green"]
 for i in range(1,300):
 for i in range(1,300):
+    pen.color(color[i%4])
     pen.forward(i)
     pen.forward(i)
     pen.right(91)
     pen.right(91)
-    len+=1
 pen.hideturtle()
 pen.hideturtle()
 turtle.done()
 turtle.done()