save project

diy1.py

@@ -3,11 +3,12 @@
 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
-pen=["red",""]
+t=["red","orange","yellow","green"]
 pen=turtle.Pen()
 # 隐藏画笔，保存画布
 i=1
 for i in range(240):
+    pen.pencolor(t[i%4])
     pen.forward(i)
     pen.right(91)
     i+=1