baaah! sorry for being so lazy, it makes perfect sense now, thx!
the pen is oversimplified, i have X items which starts the tween with different duration, i wanted to emulate a countdown, so used repeat: -1 and increased an external index onRepeat, but as u can guess, that didn't work too.. and now i understand the reason why
for my purpouse should be ok check the value on the callback, but using time to evaluate and get the percentage..
i think the timeline would make it cleaner.. but for now i'm quite happy! ?