Previous and next button

Hello, everyone I’m trying to make an audible Quran app, but I’m facing some issues in previous and next button, and this is a screenshot of the next button blocks, I hope anyone could help me to let it
work for me

So you have only three MP3 file?

Maybe something like this will help you

Hello,I have a list contains chapters name, I call it ‘‘listmp3’’, and three reciters, i created 3 lists for each of them, it’s a play list for 114 chapters for each of them, I called them, ‘‘listehusari’’ , ‘‘listeminsh’’ , ‘‘listebader’’

thank you for your reply,i’ll try your methode

These clarifications should be made while formulating the query, no one can guess your intentions