     -webkit-animation: invert-anim 2s linear
    }

    #opacity-box {
      -webkit-animation: opacity-anim 2s linear
    }

    #brightness-box {
      -webkit-animation: brightness-anim 2s linear
    }

    #contrast-box {
      -webkit-animation: contrast-anim 2s linear
    }

    #blur-box {
      -webkit-animation: blur-anim 2s linear
    }

    #dropshadow-box {
      -webkit-animation: dropshadow-anim 2s linear
    }


    @-webkit-keyframes grayscale-anim {
        from { }
        50%  { -webkit-