   @-webkit-keyframes contrast-anim {
        from { }
        50%  { -webkit-filter: contrast(0.5); }
        to   { -webkit-filter: contrast(0); }
    }

    @-webkit-keyframes blur-anim {
        from { }
        50%  { -webkit-filter: blur(10px); }
        to   { -webkit-filter: blur(20px); }
    }

    @-webkit-keyframes dropshadow-anim {
        from { }
        50%  { -webkit-filter: grayscale(10px 15px 5px rgba(128, 128, 128, 0.5); }
        to   { -webkit-filter: drop-shadow(20px 30px 10px black));