auto save

diy1.py

@@ -5,11 +5,13 @@
 import turtle  #导入模块
 
 pen = turtle.Pen()  #创建一支笔
+screen=turtle.Screen()
+screen.bgcolor("black")
 # 请创造师在下面接着创作
-distance=1
-for i in range(300):
-    pen.forward(distance)
-    distance+=1
+colors=["red","yellow","blue","green"]
+for i in range(1,300):
+    pen.pencolor(colors[i%4])
+    pen.forward(i)
     pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()