.explosion {
    position: absolute;
    width: 600px;
    height: 600px;
    align-self: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    pointer-events: none;
    }
    .explosion .particle {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pop 3s reverse forwards;
    }

    @keyframes pop {
    from {
        opacity: 0;
    }
    to {
        top: 50%;
        left: 50%;
        opacity: 1;
    }
    }
    html, body {
    height: 100%;
    }