diff --git a/sins/run.py b/sins/run.py
index 7a3a372..93b0e5f 100755
--- a/sins/run.py
+++ b/sins/run.py
@@ -6,10 +6,26 @@ from random import randint
 import binascii
 import ctypes
 import logging
-import subprocess
 import mmap
 
-seed_shell = b'\x55\x90\x48\x89\xe5\x90\x48\x89\x7d\xf8\x90\x48\x8b\x45\xf8\x90\x5d\x90\xc3'
+template_shell = b''.join([
+    b'\x55',              # push   rbp
+    b'\x48\x89\xe5',      # mov    rbp,rsp
+    b'\x48\x89\x7d\xf8',  # mov    QWORD [rbp-0x8],rdi
+    b'\x48\x8b\x45\xf8',  # mov    rax,QWORD [rbp-0x8]
+    b'\x5d',              # pop    rbp
+    b'\xc3'])             # ret
+
+seed_shell = b''.join([
+    b'\x55',
+    b'\x48\x89\xe5',
+    b'\x90' * randint(8, 64),
+    b'\x48\x89\x7d\xf8',
+    b'\x90' * randint(8, 64),
+    b'\x48\x8b\x45\xf8',
+    b'\x5d',
+    b'\xc3'])
+
 
 def shell_func(shellcode: bytes):
     prot = mmap.PROT_READ | mmap.PROT_WRITE | mmap.PROT_EXEC
@@ -68,10 +84,11 @@ def sins():
         with seed.open('rb') as seed_file:
             seed_data = seed_file.read()
 
-    logger.info(f'seed_data\n{seed_data}')
-    logger.info(f'seed_len: {len(seed_data)}')
+    seed_len = ctypes.c_uint(len(seed_data))
+    logger.info(f'seed_data\n{binascii.b2a_hex(seed_data)}')
+    logger.info(f'seed_len: {seed_len}')
 
     seed = shell_func(seed_shell)
-    ret_val = seed(ctypes.c_uint(len(seed_data)))
+    ret_val = seed(seed_len)
 
     logger.info(f'ret_val:  {ret_val}')