diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..90e0325
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,21 @@
+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:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username :
+            print("用户名错误!")
+            continue
+        if password != userpassword: 
+            print("密码错误!")
+else:   
+    print("说")
+    exit()
+print("欢迎来到贝尔编程!")
+