i can not upload on uno

when pressing on reset the led on pin13 not blinking what is happening to my board please help

plus it is not uploading to arduino uno board :

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xa8
and till
attempt 10 of 10:
held

Not a lot to go from... Did it work before? What was the last thing that worked? What's connected to the board? etc etc.

i uploaded bareminimum and pack it and today i want to learn on it did not respond

That's still not a lot. Tell us EXACTLY what you did, what happened etc. HINT. it will take you a hell lot more then one line to tell us ;)