save project

diy1.py

@@ -3,15 +3,14 @@
 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()
 pen = turtle.Pen()
-pen = color.Pen()
-
 screen.bgcolor("black")
 colors=["red","orange","yellow","green"]
 for i in range(1,300):
-    pen.color(colors[1%4])
     pen.forward(i)
+    pen.pencolor(colors[i%4])
     pen.right(91)
-
+# 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()
\ No newline at end of file