why am i unable to use my LG VISTA?

A

AC Question

It had 33% so I put it on charger....I went to look at it 20 min later and the phone is black with a white rectangular box and it says: Android is starting and it continues to have a circle going round and round it also says: starting apps. I can barely see the phone. Also, none of the buttons on the back work to stop this action that has been going on for at least 45 min now.