save project

diy1.py

@@ -4,11 +4,13 @@
 """
 import turtle
 pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
 # 请创造师在下面接着创作
-pen.color("light blue")
+colors=["light blue","green","blue","light green"]
 for i in range(300):
     pen.forward(i)
-    
+    pen.color(colors[i%4])
     pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()