save project

diy1.py

@@ -8,7 +8,8 @@ pen = turtle.Pen()
 # 请创造师在下面接着创作
 # 请创造师在下面接着创作
 distance=1
 distance=1
 colors=["red","orange","yellow","green"]
 colors=["red","orange","yellow","green"]
-pen.bgcolor("black")
+screen=turtle.Screen()
+screen.bgcolor("black")
 for i in range(1,300):
 for i in range(1,300):
     pen.pencolor(colors[i%4])
     pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.forward(i)