auto save

diy1.py

@@ -4,11 +4,12 @@
 """
 import turtle
 pen = turtle.Pen()
-distance=1
-for i in range(300):
-    pen.forward(distance)
+screen=turtle.Screen()
+colors=["red","orange","yellow","green"]
+for i in range(1,300):
+    pen.pencolor(colors[i%4])
+    pen.forward(i)
     pen.right(91)
-    distance+=1
 # 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()