save project

diy1.py

@@ -6,7 +6,11 @@ import turtle
 
 
 pen = turtle.Pen()
 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
+color=["red","yellow","green","blue"]
+s = turtle.Screen()
 for i in range(1,1000,2):
 for i in range(1,1000,2):
+    s.bgcolor(color[i%4])
+    pen.pencolor(color[i%4])
     pen.forward(i)
     pen.forward(i)
     i+=1
     i+=1
     pen.right(91)
     pen.right(91)