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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              .wrapper
	section.sec01
	section.sec02
	section.sec03
	
.alternative Pure CSS Hover
	a(href='https://codepen.io/xichen/pen/qjXdaK', target='_blank') Alternative: TweenMax
            
          
!
            
              =square($w, $h)
	width: $w
	height: $h
body, html
	margin: 0
	padding: 0
	height: 100%
	background: black
.wrapper
	+square(100%, 100%)
	section
		+square(calc(100% / 3), 100%)
		float: left
		filter: grayscale(50%)
		transition-duration: .5s
		position: relative
		&::before
			content: ''
			position: absolute
			width: 100%
			height: 100%
			background: linear-gradient(rgba(black, .6), transparent)
			opacity: 1
			transition: .3s
		&.sec01
			background: url('https://unsplash.it/1200/800?image=1015')
		&.sec02
			background: url('https://unsplash.it/1200/800?image=944')
		&.sec03
			background: url('https://unsplash.it/1200/800?image=877')
		&.sec01, &.sec02, &.sec03
			background-repeat: no-repeat
			background-position: 50% 50%
			background-size: cover
	&:hover
		section
			&:hover
				width: 40%
				filter: grayscale(0%)
				&::before
					opacity: 0
			&:not(:hover)
				width: 30%
		
@import 'https://fonts.googleapis.com/css?family=Lato:300'
.alternative
	display: inline-block
	top: 50%
	left: 50%
	position: absolute
	transform: translate(-50%, -50%)
	font-family: 'Lato', Arial, sans-serif
	letter-spacing: .08em
	line-height: 1
	font-size: 2.4rem
	text-align: center
	color: rgba(white, .6)
	background: rgba(black, .4)
	padding: .6em 1em
	a
		margin-top: 15px
		font-size: 1.2rem
		display: block
		padding: .6em 0
		background: rgba(white, .2)
		color: rgba(white, .6)
		text-decoration: none
		transition-duration: 0.3s
		&:hover
			background: rgba(white, .6)
			color: #333
            
          
!
            
              # ヽ(○´w`○)ノ Empty here!
            
          
!
999px
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