autodetecion codee

mkdir /home/pi/RetroPie/roms/amiga
    cd /home/pi/RetroPie/roms/amiga
    clear
    zip="/home/pi/RetroPie/roms/amiga/amigasnapped.zip"
    roms="/home/pi/RetroPie/roms/amiga/Xenon.adf"
    if [ -f "$roms" ]
        then
            echo "Romset already download and extracted. Please uninstall first."
            sleep 15
        else
            if [ -f "$zip" ]
                then
                    echo "Romset main archive already there so Gamewizard will extract it now"
                    sleep 5
                    unzip -o /home/pi/RetroPie/roms/amiga/amigasnapped.zip -d /home/pi/RetroPie/roms/amiga
                    sudo rm -f /home/pi/RetroPie/roms/amiga/amigasnapped.zip
                    sudo rm -f /home/pi/RetroPie/roms/amiga/amigasnapped.zip.*
                    clear

                        if [ -f "$roms" ]
                            then
                                echo "Amiga romset correctly installed"
                                sleep 15
                            else
                                echo "Something went wrong. Please check your free disk space or the server might be too busy."
                                echo "Please try again and notice me of the problem on facebook or the forum."
                                sleep 15
                        fi
                else
                    echo "Downloading and Extracting Romset"
                    sleep 5
                    wget -q -c  --show-progress --limit-rate=1024k http://gamewizard.ca/full/amigasnapped.zip
                    unzip -o /home/pi/RetroPie/roms/amiga/amigasnapped.zip -d /home/pi/RetroPie/roms/amiga
                    sudo rm -f /home/pi/RetroPie/roms/amiga/amigasnapped.zip
                    sudo rm -f /home/pi/RetroPie/roms/amiga/amigasnapped.zip.*
                    if [ -f "$roms" ]
                            then
                                echo "Romset sucessfully installed."
                                sleep 15
                            else
                                echo "Something went wrong. Please check your free disk space or the server might be too busy."
                                echo "Please try again and notice me of the problem on facebook or the forum."
                                sleep 15
                        fi
                fi
    fi
    ###sudo reboot now
    cd /home/pi
}