Controlling While loops

index.js

function ABlockingFunction( stopAtTime ){
  var StartAt = new Date();
  var animation = ['Running...'];
  while( StartAt <= stopAtTime ){
    StartAt = new Date();
    animation.push('.')
    console.log(animation.join(''));
  }
  return this;
}

var stopAt = new Date();
stopAt.setMinutes(stopAt.getMinutes() + 1);
ABlockingFunction(stopAt);