Why doesn't my iPod 5G 32GB startup?

Hello everyone,

Yesterday while I was FaceTiming, my iPod run out of battery and while charging, I tried to turn it on but it couldn't startup.

Since then and everytime I push the lock buttom it appear the apple sticker but then it desappears and nothing else happens...

Could somebody help me with that, please?

I tried to restart is with lock and home button but nothing happened.