function getRandomArbitrary(min, max) {
            return Math.random() * (max - min) + min;
        }
        function getRandomInt(min, max) {
            return Math.floor(Math.random() * (max - min + 1)) + min;
        }

        var a = true;
        if (a) {
            for (var i = 0; i < 10; i++) {
                $('body').append('<div class="fake_div" style="filter: blur(5px); pointer-events: none; opacity: 0.01; border: 1px solid white; transition: all .3s; position: fixed; left: 0; top: 0; width: 0px; height: 0px; border-radius: 20px;"></div>');
            }
            $(window).on('scroll', function(e) {
                $('.fake_div').each(function(index, el) {
                    $(el)
                        .css('border-bottom-width', getRandomInt(15, 20))
                        .css('box-shadow', '1px '+getRandomInt(1, 10)+'px 10px')
                        .css('transform', 'translate3d('+getRandomArbitrary(0, 10)+'px,'+getRandomArbitrary(0, 10)+'px,250px) rotate3d(0, 1, 0, '+getRandomArbitrary(0, 45)+'deg) scale3d(0.5, 0.5, 0.5)');
                });
            });
        }