save project

diy1.py

@@ -5,8 +5,12 @@
 import turtle
 pen = turtle.Pen()
 # 请创造师在下面接着创作
-for i in range(1,300):
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["red","orange","yellow","green"]
+for i in range(2,900):
    pen.forward(i)
+   pen.pencolor(colors[i%4])
    pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()