save project

sifang2.py

 import turtle
 i=int(turtle.textinput("fengche","层数"))
-
+turtle.bgcolor("black")
 turtle.speed(10)
-turtle.color("light blue")
+color=["red","blue","green","pink"]
 for a in range(1,i):
+    turtle.color(color[a%4])
     turtle.forward(a)
     turtle.right(91)
 turtle.hideturtle()