diff --git a/app/main.py b/app/main.py
index a570d79e..97856efc 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,9 +1,23 @@
 from datetime import datetime  # DO NOT CHANGE THIS IMPORT
+from time import sleep
 
 
-def main():
-    # write your code here
-    pass
+def main() -> None:
+    """
+    Create a log file every second with the current timestamp.
+    The file name follows the format 'app-H_M_S.log' and the content includes
+    the full date and time (YYYY-MM-DD HH:MM:SS).
+    """
+    while True:
+        get_time = datetime.now()
+        ts_str = get_time.strftime("%Y-%m-%d %H:%M:%S")
+        file_name = f"app-{get_time.hour}_{get_time.minute}_{
+            get_time.second}.log"
+
+        with open(file_name, "w") as file:
+            file.write(ts_str)
+            print(ts_str, file_name)
+        sleep(1)
 
 
 if __name__ == "__main__":