#facebookboton{cursor:pointer; background-size:100px; background-image:url(https://img.webme.com/pic/s/supermarioworldsnes/facebook-logo.png); position:absolute; left:-50px;width:100px; height:100px;opacity:0.5;} #youtubeboton{cursor:pointer; background-size:100px; background-image:url(https://img.webme.com/pic/s/supermarioworldsnes/youtube-logo.png); position:absolute; left:-50px;width:100px; height:100px;opacity:0.5;}

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSNX_hmDs408pqhd-9EBCaGZyWgQDlVvQLa3VgwALyqCujERjJ8rw