save project

hello.py

 import turtle
 pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+l=["red","pink","brown","blue"]
 for i in range(1,301,1):
+    pen.pencolor(l[i%4])
     pen.forward(i)
     pen.right(91)
 pen.hideturtle()