save project

diy1.py

-"""
-使用turtle模块画图
-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
 import turtle
 
 
+screen=turtle.Screen()
+screen.bgcolor("yellow")
 pen = turtle.Pen()
 pen = turtle.Pen()
-for i in range(1,300,1):
+colors=["red","blue","orange","green"]
+for i in range(1,550,1):
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.forward(i)
     pen.right(91)
     pen.right(91)
 pen.hideturtle()
 pen.hideturtle()