save project

sb.py

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