diff --git a/run.py b/run.py
new file mode 100644
index 0000000..0ec460c
--- /dev/null
+++ b/run.py
@@ -0,0 +1,87 @@
+#! /usr/bin/env python3
+# encoding: utf-8
+import os
+import logging
+import subprocess
+import json
+import binascii
+
+
+class Sins():
+    logger = logging.getLogger()
+
+    def __init__(self, parent, seed=None, run_dir=None):
+        self.logger.info('execute\n{}'.format(json.dumps(
+            (parent, seed, run_dir))
+        ))
+
+        if os.path.isdir(run_dir):
+            self.run_dir = os.path.abspath(run_dir)
+
+        path = self.scrap_recent(self.run_dir)
+        if not path:
+            path = os.path.abspath(seed)
+
+        self.seed = path
+
+        parent = os.path.abspath(parent)
+        if not os.path.isfile(parent):
+            raise ValueError('Invalid executable image path.')
+
+        self.parent = os.path.abspath(parent)
+
+        parsed = self.parent, self.seed, self.run_dir
+        self.logger.info('parsed\n{}'.format(json.dumps(parsed)))
+
+        scrap = self.seed
+
+        while True:
+            self.logger.info('execute\n{}'.format(
+                json.dumps((self.parent, scrap, self.run_dir))
+            ))
+            self.execute(self.parent, scrap, self.run_dir)
+
+            path = self.scrap_recent(run_dir)
+            if path:
+                scrap = path
+
+    def scrap_recent(self, run_dir):
+        scraps = sorted(os.listdir(run_dir))
+
+        if scraps:
+            return os.path.join(run_dir, scraps[-1])
+
+        return None
+
+    def execute(self, parent, seed, cwd):
+        subprocess.run([parent, seed], cwd=cwd)
+
+
+def hex_dumps(scrap_dir):
+    scrap_dir = os.path.abspath(scrap_dir)
+    scraps = os.listdir(scrap_dir)
+    for scrap in scraps:
+        if '.hex' not in scrap:
+            scrap = os.path.join(scrap_dir, scrap)
+            out = os.path.join(scrap_dir, '{}.hex'.format(scrap))
+            with open(scrap, 'rb') as file_in, open(out, 'w') as file_out:
+                    binary = bytes(file_in.read())
+                    for each in binary:
+                        file_out.writelines('\'\\x{:02X}\',\n'.format(each))
+
+
+if __name__ == '__main__':
+    import argparse
+
+    logging.basicConfig(filename='sins.log', level=logging.DEBUG)
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-seed', default='build/scrap.asm.2.o')
+    parser.add_argument('-parent', default='build/sins')
+    parser.add_argument('-dir', default='sandbox')
+    parser.add_argument('-dumps', action='store_true')
+    args = parser.parse_args()
+
+    if args.dumps:
+        hex_dumps(args.dir)
+    else:
+        sins = Sins(parent=args.parent, seed=args.seed, run_dir=args.dir)