button scroll to top

/*button scroll-to-top*/
var amountScrolled = 200;

$(window).scroll(function() {
	if ( $(window).scrollTop() > amountScrolled ) {
		$('.to-top').fadeIn('slow');
	} else {
		$('.to-top').fadeOut('slow');
	}
}); 
$('.to-top').click(function() {
	$('html, body').animate({
		scrollTop: 0
	}, 700);
	return false;
});  


});

//html
<div class="to-top"></div>

//sass
.to-top
	width: 50px
	height: 50px
	box-shadow: 0 2px 4px 0 rgba(0,0,0,.25)
	position: fixed
	bottom: 111px
	right: 43px
	background-color: $whiteColor
	background-image: url("../img/arrow-top-blue.png")
	background-repeat: no-repeat
	background-position: center center
	cursor: pointer
	z-index: 99999
	display: none