Ipod touch 8GB stuck in loop after resetting ipod during update

I reset my ipod touch 4th generation while it was going through an update because it stoped during the update and would not continue and i couldnt get out of the update screen. after doing so the ipod goes to the start up screen and does either of three things. 1. turns on, goes to boot up screen with apple logo and then goes to a screen with colors varying in blue. 2. ipod stays in a continued reset where the apple logo appears as though its turning on and after about a minute or two then flashes starts again. or 3 starts up and stays on the boot up screen and stays there. i have tried connecting to my computer and to itunes with no avail. any help would be appreciated