save project

diy1.py

@@ -5,8 +5,9 @@
 import turtle
 import turtle
 color=["red","orange","yellow","green"]
 color=["red","orange","yellow","green"]
 pen = turtle.Pen()
 pen = turtle.Pen()
+sr=turtle.Screen()
 # 请创造师在下面接着创作
 # 请创造师在下面接着创作
-
+sr.bgcolor("black")
 for i in range(1,300):
 for i in range(1,300):
     pen.pencolor(color[i%4])
     pen.pencolor(color[i%4])
     pen.forward(i)
     pen.forward(i)