save project

diy1.py

@@ -4,16 +4,17 @@
 """
 import turtle
 import random
+screen = turtle.Screen()
 pen = turtle.Pen()
 pen.shape("turtle")
 pen.hideturtle()
-pen.pensize(3)
+pen.pensize(2)
 c = ["red","green","orange","yellow"]
-for i in range(1,600,5):
-    banana = random.choice(c)
+for i in range(1,300):
+    screen.bgcolor(c[i%4])
+    pen.pencolor(c[i%4])
     pen.forward(i)
     pen.right(91)
-    pen.color(banana)
     pen.speed(9999999)
 # 隐藏画笔，保存画布
 pen.hideturtle()