auto save

diy1.py

 import turtle
 pen = turtle.Pen()
-distance=150
-for i in range(300):
-    pen.forward(distance)
-    distance-=1
-    pen.right(89)
+screen = turtle.Screen()
+screen.bgcolor("black")
+color = ["red","orange","blue","yellow"]
+for i in range(1,10000,1):
+    pen.pencolor(color[i%4])
+    pen.forward(i)
+    pen.right(91)
 pen.hideturtle()
 turtle.done()
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