JSFiddle - React, Tailwind, and code Playground

HTML

<div id="background">
	<div id="blur"></div>
</div>

CSS

#background {
	position: absolute;
	left: 10px;
	top: 10px;
	width: 600px;
	height: 600px;
	
	background-image: url(http://images.apple.com/home/images/osx_hero.jpg);
    background-image: url(http://i.stack.imgur.com/Wow4l.jpg);
    background-position: 0 0;
}
#blur {
	position: absolute;
	left: 50px;
	top: 50px;
	width: 120px;
	height: 500px;
	
	background-image: url(http://images.apple.com/home/images/osx_hero_blur.jpg);
    background-image: url(http://i.stack.imgur.com/l8bXw.jpg);
	background-position: -50px -50px;
}