save project

diy1.py

-import turtle
-
-screen=turtle.Screen()
-screen.bgcolor("light blue")
-
-pen=turtle.Pen()
-pen.penup()
-pen.goto(100,-100)
-pen.write("诺依.\nturtle真好用。\n我会在画布上写字啦！"，font=("times",30,"normal"))
-pen.hideturtle()
-
-
-penl=turtle.Pen()
-penl.pencolor("red")
-penl.pensize(5)
-
-len=60
-penl.left(45)
-penl.forward(2*len)
-penl.circle(50,180)
-penl.right(90)
-penl.circle(50,180)
-penl.forward(2*len)
-penl.hideturtle()
-turtle.done()
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+username = "python"
+userpassword = "123456"
+while True:
+    name=input("请输入用户名：")
+    password=input("请输入密码：")
+    if name==username and password==userpassword:
+        print("登录成功！")
+        break
+    print("用户名和密码错误！请重新输入")
+print("欢迎来到贝尔编程！")
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