[arch-general] Systemd screen brightness

Hey everyone, I'm trying to get my laptop backlight keys (fn+f6/f7) to adjust the brightness of my toshiba laptop backlight. Previously, I had entered the following in my /etc/acpi/handler.sh to handle the acpi events generated when those keys were pressed: video/brightnessdown) echo $(($(cat /sys/class/backlight/acpi_video0/brightness) -1)) > /sys/class/backlight/acpi_video0/brightness ;; video/brightnessup) echo $(($(cat /sys/class/backlight/acpi_video0/brightness) +1)) > /sys/class/backlight/acpi_video0/brightness ;; However, as I am working on migrating to systemd, acpid no longer runs and hence does not handle these events. How can I write a similar handler into systemd? Thanks, Mike