diff --git a/modeset.py b/modeset.py
new file mode 100755
index 0000000..9b5fdc3
--- /dev/null
+++ b/modeset.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+#
+#       Ferit Yiğit BALABAN, <fyb@duck.com>
+#
+#       modeset.py is a handy theme switcher for multiple applications.
+from datetime import datetime
+import os
+import sys
+from subprocess import run 
+
+
+HOME_FOLDR = '/home/ferit'
+PATH_LOGFL = f'{HOME_FOLDR}/navi.log'
+DARK_THEME = f'{HOME_FOLDR}/repos/kitty-themes/themes/hardcore.conf'
+LGHT_THEME = f'{HOME_FOLDR}/repos/kitty-themes/themes/Novel.conf'
+DARK_WLLPR = f'{HOME_FOLDR}/sources/wallpapers/6kkzj7.png'
+LGHT_WLLPR = f'{HOME_FOLDR}/sources/wallpapers/5dd9v9.png'
+DARK_FETCH = f'{HOME_FOLDR}/scripts/fetchdark.theme'
+LGHT_FETCH = f'{HOME_FOLDR}/scripts/fetchlight.theme'
+PATH_KITTY = f'{HOME_FOLDR}/.config/kitty/theme.conf'
+PATH_FETCH = f'{HOME_FOLDR}/scripts/fetch.theme'
+KBD_NAME = 'asus::kbd_backlight'
+
+
+def write(status: str):
+    log = f'[{datetime.now().strftime("%d/%m/%y-%H.%M.%S")}]'
+    log += 'navi is going dark.' if status == 'dark' else 'navi is enlightened.'
+    with open(PATH_LOGFL, 'a') as f:
+        f.write(log)
+        f.close()
+
+
+def set_kbdlight(intensity: int):
+    run(['brightnessctl', 'set', '--device', KBD_NAME, str(intensity)])
+
+
+def set_wallpaper(wallpaper: str):
+    run(['nitrogen', '--set-centered', wallpaper])    
+
+
+def set_fetchpy(theme: str):
+    try:
+        os.remove(PATH_FETCH)
+    except FileNotFoundError:
+        pass
+    os.symlink(theme, PATH_FETCH)
+
+
+def set_kitty(theme: str):
+    try:
+        os.remove(PATH_KITTY)
+    except FileNotFoundError:
+        pass
+    os.symlink(theme, PATH_KITTY)
+
+
+def main():
+    sys.argv.reverse()
+    sys.argv.pop()
+    if len(sys.argv) != 0:
+        mode = sys.argv.pop()
+        if mode == 'd' or mode == 'dark':
+            set_kitty(DARK_THEME)
+            set_wallpaper(DARK_WLLPR)
+            set_fetchpy(DARK_FETCH)
+            set_kbdlight(1)
+            write('dark')
+        elif mode == 'l' or mode == 'light':
+            set_kitty(LGHT_THEME)
+            set_wallpaper(LGHT_WLLPR)
+            set_fetchpy(LGHT_FETCH)
+            set_kbdlight(0)
+            write('light')
+        else:
+            print("Error: expected d, dark, l or light as argument.")
+            exit(1)
+    exit(0)
+
+
+if __name__ == '__main__':
+    main()