save project

diy1.py

 import turtle
 pen = turtle.Pen()
+screen = turtle.Screen()
+screen.bgcolor("black")
+color_list = ["red","blue","green","pink"]
 pen.clear()  
-distance = 1
 pen.speed(20)
 pen.down()
 # 请创造师在下面接着创作
 for i in range(1,3000):
     pen.forward(i)
     pen.left(91)
+    pen.color(color_list[i%4])
 pen.up
 # 隐藏画笔，保存画布
 pen.hideturtle()
-turtle.done()
\ No newline at end of file
+turtle.done()