diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..0c96793
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,15 @@
+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    if name == username:
+        password = input("请输入密码:")
+    
+        if password != userpassword:
+            print("密码错误")
+    else:
+        print("用户名错误")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+print("欢迎来到贝尔编程!")
\ No newline at end of file
diff --git a/diy3.py b/diy3.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/diy3.py