paragraphs = document.queryselector('.swiper-container').queryselectorall('p');
for (var i = 0; i < paragraphs.length; i++) {
    var paragraph = paragraphs[i];
    var str = paragraph.innerhtml;
    var array = str.split("");
    paragraph.innerhtml = '';
    for (j = 0; j < array.length; j++) {
        if (j % 2 == 0) {
            classname = 'odd'
        } else {
            classname = 'even'
        }
        paragraph.innerhtml += ('<span class=' + classname + '>' + array[j] + '</span>')
    }
}
var swiper = new swiper('.swiper-container', {
    autoplay: 6000,
    speed: 500,
    autoplaydisableoninteraction: false,
    loop: true,
    effect: 'slide',
    pagination: '.swiper-pagination',
    nextbutton: '.swiper-button-next',
    prevbutton: '.swiper-button-prev',
    paginationclickable: true,
});