save project

diy1.py

@@ -4,11 +4,15 @@
 """
 import turtle
 pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["red","yellow","green","light blue"]
 pen.speed(2000)
 # 请创造师在下面接着创作
 for i in range(0,2001):
+    pen.color(colors[i%4])
     pen.forward(i)
-    pen.right(121)
+    pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()
\ No newline at end of file