save project

diy1.py

 import turtle
 pen=turtle.Pen()
-for i in range(1.300):
+screen=turtle.Screen()
+a=["red","green","orange","yellow"]
+screen.bgcolor("black")
+for i in range(1,300):
+    pen.color(a[i%4])
     pen.forward(i)
     pen.right(91)
 pen.hideturtle()