save project

diy1.py

@@ -5,9 +5,13 @@
 import turtle
 
 pen = turtle.Pen()
+s=turtle.Screen()
 # 请创造师在下面接着创作
-
+s.bgcolor("black")
+pen.speed(100)
 for i in range(500):
+    c=["red","yellow","orange","green"]
+    pen.color(c[i%4])
     pen.forward(i)
     pen.right(91)
 # 隐藏画笔，保存画布