save project

diy1.py

@@ -5,9 +5,12 @@
 import turtle
 import turtle
 
 
 pen = turtle.Pen()
 pen = turtle.Pen()
-# 请创造师在下面接着创作
+screen=turtle.Screen()
+screen.bgcolor("black")
 
 
-for i in range(300):
+colors=["green","yellow","red","orange"]
+for i in range(1,300,1):
+    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