using caps lock led to show compose key state

i have remapped my caps lock to compose, just like jarmund i don't need my caps lock. this however disables the caps lock led completely. I'm looking for way to turn that led when i triggered the compose key and off when it's done so far i have found can manually trigger the led by runnning echo 1 > /sys/class/leds/input3\:\:capslock/brightness as root