raffx,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
div.active {
background-color: #FFFF00;
transition: none;
}
div{
width: 70px;
height: 140px;
background: green;
position: absolute;
left: 0;
top: 0;
transition: all 1.8s ease-out;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script>
$(function() {
$(window).on("mousemove", function(pos) {
$(".active").css({
"left": pos.pageX + "px",
"top": pos.pageY + "px"
})
});
$(window).on("click", function(event) {
if ($("#main").is(".active")) $("#main").removeClass("active").removeAttr("style");
else if ($(event.target).is("#main")) $("#main").addClass("active")
})
});
</script>
</head>
<body>
<div id="main" >Click me!</div>
</body>
</html>
