There are also few very simple keyboard type programs. You can check on web. I have one instaled,altho i forgot the name (im on mobile atm). Basicly you type in a window what you want it to type,and time to repeat it. Like.. Number 4 (every 1 sec).Anyway,you will figure it out if interested.
...and get banned as you're using 3rd party program and basicly botting. However, I don't think there's a way for Admin to find out whether the player has had a piece of paper stuck between keys or is just using a 3rd party program, so might just go with it anyway. Certainly takes less time than sticking a piece of paper.