save project

diy1.py

-
 import turtle
 import turtle
 len=1
 len=1
 pen=turtle.Pen()
 pen=turtle.Pen()
-for i in range(3000):
+screen=turtle.Screen()
+screen.bgcolor("black")
+c=["red""orange""yellow""green"]
+pen.speed(10)
+for i in range(300):
+    pen.pencolor(c[i%4])
     pen.forward(len)
     pen.forward(len)
-    pen.right(1)
+    pen.right(91)
     len=len+1
     len=len+1
 pen.hideturtle()
 pen.hideturtle()
 turtle.done()
 turtle.done()
\ No newline at end of file