text: var subscribe = require('..');
  
  var subscribeElement = document.querySelector('.subscribe-mouse-move');
  var unsubscribeElement = document.querySelector('.unsubscribe-mouse-move');
  var unsubscribe;
  
  var x = document.querySelector('.x');
  var y = document.querySelector('.y');
  
  subscribe(subscribeElement, 'click', function() {
      unsubscribe = subscribe(document, 'mousemove', function(e) {
          x.value = e.pageX;
          y.value = e.pageY;
      });
      unsubscribeElement.style.display = '';
      subscribeElement.style.display = 'none';
  });
  
  subscribe(unsubscribeElement, 'click', function() {
      unsubscribe();
      subscribeElement.style.display = '';
      unsubscribeElement.style.display = 'none';
  });