Untitled

dabblet.css

 body {
background: linear-gradient(45deg, #f06, yellow);
min-height: 100%;}

#monkey {
width:150px;
height:150px;
margin:auto;
border: 2px inset #fff;
border-radius:75px;
background: url('http://images1.wikia.nocookie.net/__cb20100311140518/desencyclopedie/images/0/09/Killer_monkey.jpg') no-repeat;
background-size: auto 150px;}

#monkey:hover {
background: rgba(0,0,0,0.5) no-repeat fixed, url('http://images1.wikia.nocookie.net/__cb20100311140518/desencyclopedie/images/0/09/Killer_monkey.jpg');} 
/*url('http://images1.wikia.nocookie.net/__cb20100311140518/desencyclopedie/images/0/09/Killer_monkey.jpg') no-repeat*/

dabblet.html

<div id="monkey"></div>

settings.json

{"view":"split","fontsize":"80","seethrough":"","prefixfree":"1","page":"all"}