image spliter

#!/bin/bash
loc () {
    while true; do
        read -e -p "Please enter the path to the folder that terrain.png is in: " -i "./" $loc;
        strip
    done
}
strip () {
    mkdir $loc/out;
    convert $loc/terrain.png -crop $res  +repage  +adjoin  $loc/out/terrain_%02d.png;
    echo "Done!"
    exit
}
res () {
    echo "Please Select the resolution of this pack?"
    select res in "16x16" "32x32" "64x64" "128x128" "256x256" "exit"; do
        if [ "$res" == "exit" ]
            then exit
            else loc
        fi;
    done
}

res