AE ENHANCERS

Hi, so I have a cube animated in a precomp.

1-2 sec - breathing/waiting.
2-3 sec - jumping
3-4 sec - jumping and rotating
4-5 sec - rotating

I would like to be able to trigger the animations via layer markers named 1 to 4 for each different animation. is there an expression that can do that.

What would also be good would be if each animation had a loop checkbox, so if I insert a layer marker 1 the breathing animation would just loop until i add another layer maker with a different number to the layer.

Hope that makes sense

Thanks