my $sv_menu = $menubar->Menubutton(
    -text => "Sv",
    -activebackground => 'blue',
    -activeforeground => 'white',
    -tearoff => 0,
    -menuitems => [
        [
            Button => '~Conf',
            -command  => \&hello,
            -accelerator => '<Ctrl-c>'
        ],
        [
            Button => "~Utility",
            -command  => \&ello , 
            -accelerator => '<Ctrl-u>'
        ],
        ["separator" => " "],
    ]
)->pack(-side => 'left');