document.addEventListener('DOMContentLoaded', function () {
  particleground(document.getElementById('particles'), {
    dotColor: '#5cbdaa',
    lineColor: '#6D7179',
    particleRadius:5,
    proximity:120,

  });
  var intro = document.getElementById('intro');
  intro.style.marginTop = - intro.offsetHeight / 2 + 'px';
}, false);