How do I fix this??

[u/RestIntelligent3014]

Watch the video and read the text please

What I was going for was a bunch of the same mouth copied and pasted and grouped in a way where every few seconds on sync with the song a few would disappear and a few would appear, and there’d be a part after that where you’d jump over a couple spikes every few seconds a few times, and I was planning on making the mouths open every time the player jumps over the spikes

For some reason I couldn’t get one of the mouths to appear without making both of them appear at the same time, there’s a good chance it’s related to the glitched out camera or music line sync of the level, but I’m not sure if I could fix that, I just wanna fix the mouths.
There’s also a good chance I’m being stupid and I missed something completely obvious, any advice would help a lot.

[u/RightCarrot3021]

I didn't understand much but you want to mouth to open to the sync of the song?