diff --git a/entropy.py b/entropy.py
index 854b618..ed7f3d7 100644
--- a/entropy.py
+++ b/entropy.py
@@ -13,7 +13,7 @@ def fetch_frame_opencv(url):
         raise ValueError("Failed to fetch frame.")
     return frame
 
-def generate_random_numbers(frame, bit_lengths=[512]):
+def generate_random_numbers(frame, bit_lengths):
     _, img_encoded = cv2.imencode('.jpg', frame)
     img_bytes = img_encoded.tobytes()
     entropy = hashlib.sha256(img_bytes).digest()
@@ -22,22 +22,21 @@ def generate_random_numbers(frame, bit_lengths=[512]):
 def main():
     parser = argparse.ArgumentParser(description="Generate random numbers from camera entropy.")
     parser.add_argument("--url", default="http://192.168.0.200/mjpg/video.mjpg", help="Camera MJPEG stream URL")
-    parser.add_argument("--single", action="store_true", help="Run once (single mode)")
+    parser.add_argument("--single", type=int, default=1, help="Generate N random numbers and exit (default: 1)")
+    parser.add_argument("--bit", type=int, default=256, help="Bit length of each random number (default: 256)")
     args = parser.parse_args()
 
-    while True:
+    for i in range(args.single):
         try:
             frame = fetch_frame_opencv(args.url)
-            random_numbers = generate_random_numbers(frame)
+            random_numbers = generate_random_numbers(frame, [args.bit])
             for number in random_numbers.values():
                 print(f"{number:x}")  # Print as hex without '0x' prefix
         except Exception as e:
             print(f"Error: {e}", file=sys.stderr)
-            if args.single:
-                return  # Exit after one attempt in single mode
-        if args.single:
-            break  # Exit after one iteration in single mode
-        time.sleep(1)  # Wait 1 second before fetching the next frame
+            return 1
+        if args.single > 1 and i < args.single - 1:
+            time.sleep(1)  # Small delay between frames in single mode
 
 if __name__ == "__main__":
     import sys