text: const buttonAbout = document.querySelector('#link-about');
  const idHiddenAbout = document.querySelector('#hiddenAbout');
  const videoAbout = idHiddenAbout.querySelector('video');
  const buttonMusic = document.querySelector('#link-music');
  const idHiddenMusic = document.querySelector('#hiddenmusic');
  const iframeMusic = idHiddenMusic.querySelector('iframe');
  let toggleButtonAbout = false;
  let toggleButtonMusic = false;
  
  buttonAbout.addEventListener('click', function(event) {
      toggleButtonAbout = !toggleButtonAbout;
      if (toggleButtonAbout) {
          idHiddenAbout.style.height = idHiddenAbout.scrollHeight+'px';
          idHiddenAbout.style.margin = '1rem 0';
          videoAbout.play();
      } else {
          idHiddenAbout.style.height = '0px';
          idHiddenAbout.style.margin = '0 0';
          videoAbout.pause();
      }
  });
  buttonMusic.addEventListener('click', function(event) {
      toggleButtonMusic = !toggleButtonMusic;
      if (toggleButtonMusic) {
          idHiddenMusic.style.height = '80px';
          idHiddenMusic.style.margin = '1rem 0';
          iframeMusic.style.display = 'inherit';
      } else {
          idHiddenMusic.style.height = '0px';
          idHiddenMusic.style.margin = '0 0';
          iframeMusic.style.display = 'none';
      }
  });