Edit in JSFiddle

$("#activate-css").click(function(){
	$("#css-box").css(
		{
			x: "30px",
			y: "25px",
			scale: [2, 1.5]
		}
	);
});

$("#reset-css").click(function(){
	$("#css-box").removeAttr("style");
});

.animate-box{
	background-color: black;
	width: 50px;
	height: 50px;
}

button{
	margin-top: 50px;
}
<div class="animate-box" id="css-box"></div>
<button type="button" id="activate-css">Muuda suurust</button>
<button type="button" id="reset-css">Reset</button>