diff --git a/pattern.py b/pattern.py
index aadca7d..5267c2b 100644
--- a/pattern.py
+++ b/pattern.py
@@ -2,15 +2,17 @@
 import sys
 import logging
 
-p = cyclic(20000,n=8)
 if len(sys.argv) < 2:
-    logging.error('usage: python3 pattern.py 0xdeadbeef')
+    logging.error('usage: python3 pattern.py 0xdeadbeef [n=8]')
     exit()
 
 address = sys.argv[1]
+n = int(sys.argv[2]) if len(sys.argv) > 2 else 8  # Default to n=8 if not provided
+
+p = cyclic(20000, n=n)
+
 if '0x' in address:
     address = address[2:]
     my_string = bytes.fromhex(address).decode('utf-8')
     my_string = my_string[::-1]
     print(f'padding is : {p.index(my_string.encode())}')
-