diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..63986ea
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,16 @@
+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
+    print("用户名和密码错误!请重新输入")
+    continue
+    if password!=userpassword:
+        print("密码输入有误，请重新输入")
+        print()
\ No newline at end of file