rom storage selector

#!/bin/bash
INPUT=/tmp/menu.sh.$$
OUTPUT=/tmp/output.sh.$$
trap "rm $INPUT; exit" SIGHUP SIGINT SIGTERM
function display_output(){
    local h=${1-82}
    local w=${2-82}
    local t=${3-Output}
    dialog --backtitle "GameWizard Boot Selector" --title "${t}" --clear --msgbox "$(<$OUTPUT)" ${h} ${w}
}

function esu(){
    clear
    sudo umount /dev/sda1
    sudo mount /dev/sda1 /home/pi/RetroPie/roms
    emulationstation
    break
}
function ess(){
    clear
    emulationstation
}
function desktop(){
    clear
    sudo startx
    clear
    break
}
function rebt(){
    clear
    echo thanks for using Gamewizard Boot-Menu
    sleep 5
    sudo reboot now
    break
}
function shut(){
    clear
    echo thanks for using Gamewizard Boot-Menu
    sleep 5
    sudo shutdown -h now
    break
}
while true
do
dialog --clear --backtitle "GameWizard Boot Selector" \
--title "[ G A M E W I Z A R D   B O O T - M E N U]" \
--menu "You can use the UP/DOWN arrow keys, the first letter of the choice as a hot key, or the number keys 1-4 to choose an option.\n\
Choose the TASK" 50 165 5 \
1-ES-USB "Boot EmulationStation using USB device as rom storage" \
2-ES-SD "Boot EmulationStation using SD-card as rom storage" \
3-Raspbian "Boot to Desktop" \
4-Reboot "Reboot cuz you forgot to plug your usb drive LOL" \
5-Shutdown "Do i really neet to put a description here ??" 2>"${INPUT}"
menuitem=$(<"${INPUT}")
case $menuitem in
    1-ES-USB) esu;;
    2-ES-SD) ess;;
    3-Rasbian) desktop;;
    4-Reboot) rebt;;
    5-Shutdown) shut;;
esac
done