CODE EXAMPLE FOR JAVASCRIPT

js particles without plugin

<style>    
.particles-js-canvas-el {
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 0;
    top: 0;
}
</style>
<script src="http://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script>
<script>

// PASTE YOUR JS CODE HERE IN SCRIPT TAG Get it from https://vincentgarreau.com/particles.js/

</script>