auto save

diy1.py

@@ -3,13 +3,16 @@
 每次移动都增加画笔移动的长度，并旋转91°，重复执行300次，查看效果
 """
 import turtle
-
+screen=turtle.Screen()
+screen.bgcolor("black")
 pen = turtle.Pen()
+pen.speed(0)
+colors=["red","orange","yellow","green"]
 # 请创造师在下面接着创作
-
-
-
-
+for i in range(1,300):
+    pen.pencolor(colors[i%4])
+    pen.forward(i)
+    pen.right(91)
 
 # 隐藏画笔，保存画布
 pen.hideturtle()