A metronome with no sounds, but with visual effects.

I play guitar, for some songs it is difficult for me to get to know the rhythm (3/4? 3/8? 6/8? 7/8? 9/8?). I tried to use metronome from Google (just search Metronome in Google), it is still difficult.

Link to play: 

Link of code:

Thanks and any feedback is appreciated!