diff --git a/extractor.py b/extractor.py
index 4296e51..045d251 100644
--- a/extractor.py
+++ b/extractor.py
@@ -64,7 +64,6 @@ class BadApple:
         if width is None and height is None:
             target_width, target_height = orig_width, orig_height
         elif width is not None and height is not None:
-            # Check aspect ratio
             if orig_width * height != orig_height * width:
                 raise ValueError("Violated aspect ratio")
             target_width, target_height = width, height
@@ -82,7 +81,6 @@ class BadApple:
         frame_count = 0
 
         with open(output_file, "w") as f, tqdm(total=total_frames, desc="Extracting frames") as pbar:
-            # Write header
             f.write(self.header(vid, fps) + f"\ntarget_resolution: {target_width}x{target_height}\n")
             while cap.isOpened():
                 ret, frame = cap.read()
@@ -91,18 +89,18 @@ class BadApple:
                 if frame_count % frame_interval == 0:
                     if (target_width, target_height) != (orig_width, orig_height):
                         frame = cv2.resize(frame, (target_width, target_height), interpolation=cv2.INTER_AREA)
-                    rgb_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
-                    rows = []
-                    for row in rgb_frame:
-                        row_str = ";".join([f"{r},{g},{b}" for r, g, b in row])
-                        rows.append(row_str)
+                    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
+                    # threshold at 128, 1 if closer to white, 0 if closer to black
+                    _, bw = cv2.threshold(gray, 128, 1, cv2.THRESH_BINARY)
+                    # convert each row to string of 0s and 1s
+                    rows = ["".join(str(bit) for bit in row) for row in bw]
                     f.write("|".join(rows) + "\n")
                 frame_count += 1
                 pbar.update(1)
         cap.release()
-        # print filesize
-        file_size_in_gb = os.path.getsize(output_file) / (2**30) 
+        file_size = os.path.getsize(output_file) / (2**30) 
         print(f"Extracted {frame_count} frames to {output_file} ({file_size:.2f} gb)")
+        
     def download_videos(self, keys: List[str]) -> None:
         os.makedirs("apples", exist_ok=True)
         for key in keys:
diff --git a/x11/xHandler.c b/x11/xHandler.c
index 330e4e7..1b1aa6e 100644
--- a/x11/xHandler.c
+++ b/x11/xHandler.c
@@ -20,11 +20,11 @@ void fill_color(Display *display, Window window, GC gc, Colormap cm, const char
     XFillRectangle(display, window, gc, 0, 0, WIDTH, HEIGHT);
 }
 
-void fill_black(Display *display, Window window, GC gc, Colormap cm) {
+void black(Display *display, Window window, GC gc, Colormap cm) {
     fill_color(display, window, gc, cm, "#000000");
 }
 
-void fill_white(Display *display, Window window, GC gc, Colormap cm) {
+void white(Display *display, Window window, GC gc, Colormap cm) {
     fill_color(display, window, gc, cm, "#FFFFFF");
 }