diff --git a/Source/sys-clk/bitmap.py b/Source/sys-clk/bitmap.py
new file mode 100644
index 00000000..2b0cdf87
--- /dev/null
+++ b/Source/sys-clk/bitmap.py
@@ -0,0 +1,53 @@
+from PIL import Image
+import argparse
+import os
+
+def image_to_rgba8888_array(image_path, output_path):
+    # Open and convert to RGBA
+    img = Image.open(image_path).convert('RGBA')
+    width, height = img.size
+
+    # Get pixel data
+    pixels = img.tobytes()
+
+    # Write as C header file
+    with open(output_path, 'w') as f:
+        f.write('// This is a generated automatically generated file, do not edit manually.\n')
+        f.write(f'// {os.path.basename(image_path)} - {width}x{height}\n')
+        f.write(f'const unsigned int IMG_WIDTH = {width};\n')
+        f.write(f'const unsigned int IMG_HEIGHT = {height};\n')
+        f.write('const unsigned char IMG_DATA[] = {\n    ')
+
+        for i, byte in enumerate(pixels):
+            f.write(f'0x{byte:02X}')
+            if i < len(pixels) - 1:
+                f.write(', ')
+                if (i + 1) % 12 == 0:
+                    f.write('\n    ')
+
+        f.write('\n};\n')
+
+    print(f'Converted: {width}x{height} -> {len(pixels)} bytes')
+    print(f'Output: {output_path}')
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='PNG -> RGB8888 script'
+    )
+    parser.add_argument('input', help='Input image file (e.g. cat.png)')
+    parser.add_argument(
+        '-o', '--output',
+        help='Output header file (default: <input>.h)'
+    )
+
+    args = parser.parse_args()
+
+    output_path = args.output
+    if not output_path:
+        base, _ = os.path.splitext(args.input)
+        output_path = base + '.h'
+
+    image_to_rgba8888_array(args.input, output_path)
+
+if __name__ == '__main__':
+    main()
diff --git a/Source/sys-clk/overlay/src/ui/gui/cat.h b/Source/sys-clk/overlay/src/ui/gui/cat.h
index a8bb88c8..a4c56ff4 100644
--- a/Source/sys-clk/overlay/src/ui/gui/cat.h
+++ b/Source/sys-clk/overlay/src/ui/gui/cat.h
@@ -14,7 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  * 
  */
-
+// this is a generated file, do not edit manually.
 // cat.png - 96x128
 static const unsigned int CAT_WIDTH = 96;
 static const unsigned int CAT_HEIGHT = 128;