<style>
.particles-js-canvas-el {
width: 100%;
height: 100%;
position: absolute;
z-index: -1;
top: 0;
left:0;
}
</style>
<script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script>
<script>
{הקוד שיצרת כאן}
</script>