.sparkle {
    background: #000;
    position: fixed;
    display: block;
    height: 0;
    width:  0;
    margin: 0 0;
    content: '';
    clip-path: polygon(
         50%   0%,
         65%  35%,
        100%  50%,
         65%  65%,
         50% 100%,
         35%  65%,
          0%  50%,
         35%  35% 
    );
}