save project

diy1.py

 
-#画风车第二种方法
+#画风车第3种方法 列表
 import turtle
 pen = turtle.Pen()
+screen = turtle.Screen()
+screen.bgcolor("black")
+colors = ["green","red","orange","yellow"]#创建列表
 for i in range(0,300):
-    pen.forward(i)#利用for循环参数
+    pen.forward(i)
+    pen.pencolor(colors[i%4])#利用colours项目 
     pen.right(91)
 # 隐藏画笔，保存画布
-pen.hideturtle()
 turtle.done()
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