My_home_scripts/,start_app_other_theme.sh

#!/bin/bash
# Coding: utf-8
# Editor: www.kate.org
# Created 2023-07-25

#_sudo_apt_install_
#_sudo_dpkg_i_

if [ -z "$1" ]
then
    echo ""
    echo "Example: d/l regexxer"
    echo "d/l dark or ligth"
    echo ""
fi

if [ "$1" == "d" ]
then
    Exec=env GTK_THEME=Adwaita:dark "$2" &
else
    if [ "$1" == "l" ]
    then
        Exec=env GTK_THEME=Adwaita:ligh "$2" &
    fi
fi