auto save

diy1.py

 import turtle
 pen = turtle.Pen()
+pen.shape("turtle")
 screen=turtle.Screen()
 screen.bgcolor("black")
-colors=["red","yellow","blue"]
+colors=["red","yellow","blue","green"]
 for i in range(1,800):
-    pen.pencolor(colors[i%3])
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.right(121)
 pen.hideturtle()