play/pause button sheet music animation

hello there

i already learnt a lot here in 2 weeds

Actions Scripts for play button, stop button, 

slideshow and more........

i am making a sheet music animation for my students

and in order to understand the sheet music....i need

a play/pause in the animation i attached here....

i have a play, i have a stop, i have a replay(the same as play)

but i need so much a help for the play/pause button action script

anyone help?

regards 

leo