Fading diagonally with CSS3

HTML

<div class="wrapper">
    <div class="block"></div>
    <div class="white-fade"></div>
</div>

CSS

.wrapper {
    position: relative;
}
.block {
    width: 100%;
    height: 100%;
    background: black;
    opacity: 1;
    transition-delay: 1s;
    transition: opacity 0.75s ease-in-out;
}

.white-fade {
    position: absolute;
    top: -25px;
    left: -20px;
    transform: rotate(45deg);
    transform-origin: 75px 75px;
    transition: width 1s ease-in-out;
    width: 0%;
    height: 150px;
    background: -moz-linear-gradient(left,  rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(255,255,255,1)), color-stop(100%,rgba(255,255,255,0))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(255,255,255,0) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(255,255,255,0) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(255,255,255,0) 100%); /* IE10+ */
background: linear-gradient(to right,  rgba(255,255,255,1) 0%,rgba(255,255,255,0) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#00ffffff',GradientType=1 ); /* IE6-9 */

}

.block-hide {
    opacity: 0;
}

.white-fade-reveal {
    width: 150px;
}

JavaScript

$(document).ready(function() {
    setInterval(function(){
        $('.white-fade').toggleClass('white-fade-reveal');
        $('.block').toggleClass('block-hide');
    }, 2000);
});