diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..b5da9ee
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,19 @@
+username = "python"
+i=0
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if i<=3:
+        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("密码错误!请重新输入") 
+            i=i+1
+        if i==3:
+            exit()
+print("欢迎来到贝尔编程!")
\ No newline at end of file