JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./styles.css">
</head>
<body>
    <div class="light">
    </div>

    <div id="car1" class="car">
    </div>
    <div id="car2" class="car">
    </div>
    <div id="car3" class="car">
    </div>
<script src='./script.js'>

    </script>
</body>
</html>

CSS

body {
    color: cyan;
    background-image: url('./1234.jpg');
    width: 100vh;
    border: 5px solid red;
}

.light {
    margin: 0 auto;
    background-color: red;
    border-radius: 50%;
    width: 50px;
    height: 50px;
}

.green {
    background-color: green;
}

.car {
    background: url(./1111.png) no-repeat center;
    background-size: cover;
    width: 70px;
    height: 30px;
    position: absolute;
    background-color: blue;
}
#car1 {
    top: 100px;
}

#car2 {
    top: 300px;
}

#car3 {
    top: 500px;
    right: 0px;
}

JavaScript

const light = document.querySelector(".light");

class Car {
  constructor(carID, speed) {
    this.car = document.getElementById(carID);
    this.speed = speed;
    this.directionFactor = 1;
  }
  move() {
    if (
      this.car.offsetLeft + this.speed > document.body.style.width ||
      this.car.offsetLeft - this.speed < 0
    ) {
      this.directionFactor *= -1;
      this.car.classList.toggle('rotate180');
    }
    this.car.style.left =
      this.car.offsetLeft + this.directionFactor * this.speed + "px";
  }
}

let car1 = new Car("car1", 5);
let car2 = new Car("car2", 1);
let car3 = new Car("car3", 2);
let isGreen = true;
let moving;

function wor() {
  if (isGreen) {
    moving = setInterval(() => {
      car1.move();
      car2.move();
      car3.move();
    }, 10);
  } else {
    clearInterval(moving);
  }
  isGreen = !isGreen;
  light.classList.toggle("green");
  setTimeout(wor, 5000);
}

wor();