save project

diy2.py

@@ -11,10 +11,15 @@
 #         print("登录成功!")
 #         break
 # print("欢迎来到贝尔编程!")
+cl=["red","violet","yellow","orange"]
 import turtle
+s=turtle.Screen()
 pen=turtle.Pen()
 for i in range (1,300):
     pen.forward(i)
+    pen.pencolor(cl[i%4])
     pen.right(91)
+s.bgcolor(black)
 pen.hideturtle()
+
 turtle.done()