need help adding an autoplay function to randomly play audio files

i need some help adding an autoplay function so it randomly plays all 12 of my files,and also need to add a pause in between them while they play, this is the code i have so far.

loopcounter = 0;
repeat = true;

while repeat
sel = input('Enter your selection:','s');

switch round(str2double(sel))
    case 1
        [y,Fs] = audioread('check_out_whats_new.wav');
        sound(y,Fs);
    case 2
        [y,Fs] = audioread('pacman_death.wav');
        sound(y,Fs);
    case 3
        [y,Fs] = audioread('buy_one_free.wav');
        sound(y,Fs);
    % etc...

        repeat = false; 
        otherwise
        disp('no valid input');
        loopcounter = loopcounter - 1;
end
    loopcounter = loopcounter + 1;
end

disp('Thank You for Playing!!')

fprintf(['%d loopcouner.\n',sel])

disp(['Total number of files played:', num2str(loopcounter)]);