save project

diy1.py

@@ -3,12 +3,14 @@
 每次移动都增加画笔移动的长度，并旋转91°，重复执行300次，查看效果
 """
 import turtle
-
+s=turtle.Screen()
+s.bgcolor("black")
 pen = turtle.Pen()
 # 请创造师在下面接着创作
+color=["red","blue","orange","gold"]
 for i in range(1,300):
+    pen.pencolor(color[i%4])
     pen.forward(i)
-    distance+=1
     pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()