Toggle Grayscale Mode with Hotkey

Hey guys! Requesting for anyone to give an apple script so that I can toggle colour filter "on" or "off" i.e. go between color and grayscale just by pressing a hotkey.

I can make one with the help of "Click or move mouse" etc but I would prefer it if didn't open any window and did the work behind the scenes.

Thank You!

Hey Sam,

This might work.