save project

diy1.py

@@ -4,9 +4,12 @@
 """
 import turtle
 pen=turtle.Pen()
+screen=turtle.Screen()
+scren.bgcolor("black")
+color=["red","orang","yellow","green"]
 pen.speed(0)
 for i in range(1,300):
-    pen.forward(i)
+    pen.forward(color[i%4])
     pen.left(91)
 # 隐藏画笔，保存画布
 turtle.hideturtle()