.animate javascript code example

Example 1: javascript animate elements

document.getElementById("tunnel").animate([
  // keyframes
  { transform: 'translateY(0px)' },
  { transform: 'translateY(-300px)' }
], {
  // timing options
  duration: 1000,
  iterations: Infinity
});

Example 2: js animation

You can learn js animation from here
https://www.w3schools.com/howto/howto_js_animate.asp