save project

diy1.py

@@ -3,12 +3,13 @@
 #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 = turtle.Pen()
+colors=['red','orange','yellow','green']
 pen.speed(100)
 i=1
 for i in range(1500):
+    pen.color(colors[i%4])
     pen.fd(i)    
     pen.right(91)   
-    i +=1
 # 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()