Untitled

dabblet.css

.frame
{
	position: relative;
	overflow:scroll;
	
	height: 500px;
	
	background: linear-gradient(bottom, #f7f5e8, #a2cce7);
	border-bottom: 4px solid orange
}

.back
{
	width: 200%;
	height: 500px;
	
	amargin-left: -50%;
	background: fixed url(https://yandex.st/lego/_/X31pO5JJJKEifJ7sfvuf3mGeD_8.png) no-repeat;
}

dabblet.html

<div class="frame">
	<div class="back"></div>
</div>

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}