save project

diy1.py

@@ -3,13 +3,15 @@
 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
-
-
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["green","red","orange","yellow"]
 pen = turtle.Pen()
 pen.speed(3000)
 for i in range(1,3000):
+    pen.pencolor(colors)
     pen.forward(i)
-    pen.left(91)
+    pen.right()(91)
 pen.hideturtle()
 pen.done()