Is this possible?

So i've had the utillity engine for quite some time now, and i wanted to make a more advanced profile.

So the idea was that when i pressed (for example) "b", a wave would roll over the whole keyboard, and then when i press the other keys, this wave wouldn't show.

I haven't had any luck trying to pull this off myself, only by assigning the certain key as a timer. But then i cant use my "b" key.

Is it possible?