how do i load bmp from the sd ?

hello,

I'm doing my first game and i don't know how to load a 80x64px .bmp file from my SD card to the gamebuino screen 

also is it possible to do like something like this (i've done something quickly to show you what i mean)

so it's like an interactive story where you have always like 2 choices 

in this case you are robbing a store but cops are here and you have 2 choices 

by pressing the A button you give your weapon to the cops and give up

by pressing B buttons you try to shoot cops 

it'll be always bmp with 80x64res 

then my question is what am i supposed to write on the arduino IDE to load the A choice or the B choice

like i push a button an image will pop and if i press b button another one will pop

again it's done quickly so it's not very pretty

thx a lot if you answer me <3