auto save

1.py

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