Composition theme mega-menu thumbnails

#primary-menu>li>ul>li:nth-child(1) > a:after {
	display: block;
	content: '';
	background: url(https://demo.graphpaperpress.com/composition/files/2016/09/screenshot-1024x640.jpg) no-repeat;
	height: 125px;
	max-width: 232px;
	background-size: 100%;
	margin: 1em 0 0;
}

#primary-menu>li>ul>li:nth-child(2) > a:after {
	display: block;
	content: '';
	background: url(http://demo.graphpaperpress.com/composition/files/2016/09/composition-business-web.jpg) no-repeat;
	height: 125px;
	max-width: 232px;
	background-size: 100%;
	margin: 1em 0 0;
}

#primary-menu>li>ul>li:nth-child(3) > a:after {
	display: block;
	content: '';
	background: url(https://demo.graphpaperpress.com/composition/files/2016/09/composition-store-1024x640.jpg) no-repeat;
	height: 125px;
	max-width: 232px;
	background-size: 100%;
	margin: 1em 0 0;
}

#primary-menu>li>ul>li:nth-child(4) > a:after {
	display: block;
	content: '';
	background: url(https://demo.graphpaperpress.com/composition/files/2016/09/composition-blog-1-1024x640.jpg) no-repeat;
	height: 125px;
	max-width: 232px;
	background-size: 100%;
	margin: 1em 0 0;
}