Simple base for Gravity Forms Conditional logic custom animations

$ = jQuery;
$(document).ready(function () {
$('.gfield').change(function () {
if ($(".gfield").is(":visible")) {
$(this).nextAll(":visible").each(function () {
$(this).animate({
opacity: 0.25,
}, 5000, function () {
// Animation complete.
});
});
}
});
});