<script type="text/javascript" >
$('.bs-sequence li').addClass('bb-anim-clear');

$(window).scroll(function() {
    if (scrollResult('.bs-sequence')) {                             // переместил блок сюда
        showAnim('.bs-sequence li:nth-child(1)', 0);
        showAnim('.bs-sequence li:nth-child(2)', 500);
        showAnim('.bs-sequence li:nth-child(3)', 1000);
    }
});

function scrollResult(varCont) {
    var windowHeight = $(window).scrollTop() + $(window).height();
    var blockOffset = varCont.offset().top + varCont.height();
    return windowHeight >= blockOffset;
}
function showAnim(varBlock, varDelay) {
    setInterval(function(){
        $(varBlock).addClass('bb-anim-slide-up');
    }, varDelay);
}
</script>