The below will repeat track one.
while(1) {
if(!MP3player.playTrack(1)) {
while (MP3player.isPlaying());
MP3player.stopTrack();
}
}
But it will block.
You can actually put
MP3player.playTrack(1);
in the loop and it will attempt to play track one, and if it is still playing it will simply respond with an error code. That can be ignored.