JSFiddle - React, Tailwind, and code Playground

HTML

<div style="position: relative; left: 0; top: 0;">
    <img id="1" src="http://i.stack.imgur.com/bFfbC.png" style="position: absolute; top: 0; left: 0;" onmousemove="animateCircles(this)" />
    <img id="2" src="http://i.stack.imgur.com/Eewcq.png" style="position: absolute; top: 0; left: 0;" onmousemove="animateCircles(this)" />
    <img id="3" src="http://i.stack.imgur.com/VXk7A.png" style="position: absolute; top: 0; left: 0;" onmousemove="animateCircles(this)" />
</div>

CSS

.normal {
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -ms-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
}
.onhover {
    -webkit-transform:scale(1.25);
    -moz-transform:scale(1.25);
    -ms-transform:scale(1.25);
    -o-transform:scale(1.25);
    transform:scale(1.25);
}

JavaScript

function animateCircles(obj) {
    var x = window.event.x - obj.offsetLeft;
    var y = window.event.y - obj.offsetTop;
    var img1 = document.getElementById('1');
    var img2 = document.getElementById('2');
    var img3 = document.getElementById('3');

    var centerR = 45;
    var middleR = 75;
    if (x >= img3.offsetLeft + (img3.offsetWidth / 2 - centerR) && 
        x <= img3.offsetLeft + (img3.offsetWidth / 2 + centerR) && 
        y >= img3.offsetTop + (img3.offsetHeight / 2 - centerR) && 
        y <= img3.offsetTop + (img3.offsetHeight / 2 + centerR))
        img3.className += " onhover";
    else
		img3.className = "normal";
        
	if (x >= img2.offsetLeft + (img2.offsetWidth / 2 - middleR) && 
               x <= img2.offsetLeft + (img2.offsetWidth / 2 + middleR) && 
               y >= img2.offsetTop + (img2.offsetHeight / 2 - middleR) && 
               y <= img2.offsetTop + (img2.offsetHeight / 2 + middleR))
        img2.className += " onhover";
    else
        img2.className = "normal";
    
	if (x >= img1.offsetLeft && 
               x <= img1.offsetLeft + img1.offsetWidth && 
               y >= img1.offsetTop && 
               y <= img1.offsetTop + img1.offsetHeight)
        img1.className += " onhover";
    else
		img1.className = "normal";
}