save project

diy1.py

@@ -3,9 +3,12 @@
 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
+colors=["red","green","orange","blue"]
+turtle.bgcolor("black")
 pen=turtle.Pen()
-for i in range(120):
+for i in range(300):
     pen.forward(i)
     pen.right(91)
+    pen.color(colors[i%4])
 pen.hideturtle()
 turtle.done()
\ No newline at end of file