Bash Script Menu Install Apps

#!/bin/bash


function app_chrome() {
    #CHROME
    cd /home/
    sudo wget https://dl.google.com/linux/linux_signing_key.pub
    sudo wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
    sudo dpkg -i google-chrome-stable_current_amd64.deb
    sudo apt-get install -f
    sudo rm -f google-chrome*.deb
    sudo rm -f *signing_key.pub
    echo -e "\e[44m_____End Chrome_____\e[0m"
}

function app_slack() {
    #SLACK
    cd /home/
    sudo wget https://downloads.slack-edge.com/linux_releases/slack-desktop-4.12.2-amd64.deb
    sudo dpkg -i slack-desktop-*.deb
    sudo rm -f slack*.deb
    echo -e "\e[44m_____End Slack_____\e[0m"
}

function app_zoom() {
    #ZOOM
    cd /home/
    sudo wget https://zoom.us/client/latest/zoom_amd64.deb
    sudo dpkg -i zoom*.deb
    sudo rm -f zoom*.deb
    echo -e "\e[44m_____End Zoom_____\e[0m"
}

function app_git() {
    sudo add-apt-repository -y ppa:git-core/ppa 
    sudo apt update; sudo apt install -y git
    echo -e "\e[44m_____End Git_____\e[0m"
}

function update_system() {
    sudo apt update -y  && sudo apt upgrade -y && sudo apt autoremove -y
}

function all() {
    app_chrome
    app_slack
    app_zoom 
    app_git
    update_system
    echo -e "\e[44m_____End ALL\e[0m"
}

menu(){
echo -ne "
**OPTIONS**
2) Install Zoom 
3) Update_system
4) Install Chrome
5) Install Slack
6) Install Git

1) --ALL--
0) Exit

Choose an option:"
        read a
        case $a in
            1) all ; menu ;;               
            2) app_zoom ; menu ;;
            3) update_system ; menu ;;
            4) app_chrome ; menu ;;            
            5) app_slack ; menu ;;
            6) app_git ; menu ;;



        0) exit 0 ;;
        *) echo -e $red"Wrong option."$clear; WrongCommand;;
        esac
}

# Call the menu function
menu