save project

diy1.py

@@ -3,14 +3,20 @@
 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
 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
 import turtle
+a=1
+color=["red","green","orange","yellow"]
 
 
 pen = turtle.Pen()
 pen = turtle.Pen()
 screen = turtle.Screen()
 screen = turtle.Screen()
+color_a=["red","green","orange","yellow"]
+pen.speed(1000)
+screen.bgcolor("black")
 
 
 
 
-for i in range(1,300):
-    pen.forward(i)
-   
+for i in range(500):
+    pen.pencolor(color_a[a%4])
+    pen.forward(a)
+    a=a+1
     pen.left(91)
     pen.left(91)