Script to increase the size of a background image as the user scrolls.
Inspired by this website: http://www.designforfounders.com/types-of-designers/
//http://stackoverflow.com/questions/25427017/increase-background-size-while-scrolling?answertab=active#tab-top
var x;
$(window).on('scroll', function() {
x = $(window).scrollTop();
$('.size').css('background-size', 100 + parseInt(x / 50, 0) + '% ');
});