auto save

diy1.py

@@ -4,8 +4,12 @@
 """
 """
 import turtle
 import turtle
 pen=turtle.Pen()
 pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["blue","purple","orange","white"]
 pen.speed(800)
 pen.speed(800)
 for i in range(1,700):
 for i in range(1,700):
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.forward(i)
     pen.left(91)
     pen.left(91)
 # 隐藏画笔，保存画布
 # 隐藏画笔，保存画布