save project

diy1.py

@@ -5,7 +5,11 @@
 import turtle
 
 pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor(("black"))
+colors=["green","red","ornge","yellow"]
 for i in range(1,300):
+    pen.pencolor(colors[%4])
     pen.forward(i)
     pen.right(91)
 # 隐藏画笔，保存画布