save project

diy1.py

 """
 """
 #使用turtle模块画图
 #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
+#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
               
               
 pen = turtle.Pen()              
 pen = turtle.Pen()              
 # 请创造师在下面接着创作              
 # 请创造师在下面接着创作              
-
-for i in range(1,200):
+screen=turtle.Screen()         
+screen.bgcolor("black")
+colors=["red","yellow","green","orange"]
+for i in range(1,300):              
+    pen.pencolor(colors[i%4])
     pen.forward(i)              
     pen.forward(i)              
     pen.right(91)              
     pen.right(91)              
 # 隐藏画笔，保存画布              
 # 隐藏画笔，保存画布              
 pen.hideturtle()              
 pen.hideturtle()              
 turtle.done()              
 turtle.done()              
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