Need a script - Ajax - jquery - toast

hi
i need a script who run few php and giving toast.

very basic

execute php 1 -> toast
execute php 2 -> toast
execute php 3 -> toast

loopback (infinite)

**************
## each files have her own execution time --­> and need to wait previous page is fully load, <--, so i cant cron job every minute etc....

i tried
- header('Location: ...');
- window.location.href='enter_your_url_here.php';

but nothing to do, navigator give error cause too many redirect.