Как сделать светофор на JS?

const colorList = [
  {name: 'yellow', interval: 500},
  {name: 'red', interval: 4000},
  {name: 'yellow', interval: 500},
  {name: 'green', interval: 4000}
];

let count = 0;

function changeColor() {
  if (count === colorList.length) {
    count = 0;
  }
  console.log(colorList[count].name)
  setTimeout(changeColor, colorList[count].interval)
  count = count + 1;
}

changeColor()