text: // Set up the listeners to trigger the event.
  $(document).ready(function() {
  	// Store history of key presses.
  	let keys = [];
  
  	// Store key sequence.
  	let code = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65, 13];
  
  	// Bind the keydown events.
  	$(document).keydown(function(e) {
  		// Push keypress into the array.
  		keys.push(e.keyCode);
  
  		// Bump the oldest keypress off the array if it exceeds the length of the sequence array.
  		if (keys.length > code.length) {
              keys.shift();
          }
  
          // If the keypress sequence matches the code array, show the modal.
          if ( keys.toString() == code.toString() ) {
          	$('#demo-modal').modal('show');
        	}
  	});
  });