save project

diy1.py

@@ -5,10 +5,12 @@
 import turtle
 
 pen = turtle.Pen()
-screen
+screen=turtle.Screen()
 colors=["red","orange","yellow","green"]
+screen.bgcolor("black")
 # 请创造师在下面接着创作
 for i in range(1,300):
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     i+=1
     pen.right(91)