save project

diy1.py

 import turtle
 pen = turtle.Pen()
 pen.speed(20)
-for i in range(1,300):
+screen = turtle.Screen()
+screen.bgcolor("black")
+x = ["red","orange","yellow","green"]
+for i in range(300):
+    pen.color(x[i%4])
     pen.forward(i)
-    pen.pensize(i)
-    
+    pen.pensize(5)
     pen.right(91)
 pen.hideturtle()
 turtle.done()