diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..1d65b01
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,18 @@
+i=3
+username = "python"
+userpassword = "123456"
+while True:
+    if i>0:
+        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
+        if name != username:               
+            print("用户名错误,请重新输入")
+            continue
+        if password != userpassword:
+            print("用户密码错误,请重新输入")
+        if i<0:
+            exit()
+print("欢迎来到贝尔编程!")