diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..4e97e0c
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,19 @@
+username = "python"
+userpassword = "123456"
+i=5
+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
+    if name!=username:
+        print("用户名错误!请重新输入")
+        i-=1
+        continue
+    if password != userpassword:
+        print("密码错误!请重新输入")
+        i-=1
+    if 1==0:
+        print("")
+print("欢迎来到贝尔编程!")
\ No newline at end of file