diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..366a82c
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,20 @@
+i=3
+username = "python"
+userpassword = "123456"
+while True:
+    if i>0:
+        i-=1
+        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('密码错误，请重新输入')
+    else:
+        print(错误)
+        exit()       
+print("欢迎来到贝尔编程!")
\ No newline at end of file