i just added that to my style.css as: (and when i stretch the page out wide im still getting white)
/*
Theme Name: Child
Template: Child
Author: Justin Sharp
Version: 1.0.01
Updated: 2014-07-29 03:34:36
*/
@charset “UTF-8”;
@import url(‘../preference-lite/style.css’);
html {
background-image: url(‘https://mike.justinrsharp.com/?p=26’);
background-position: center center;
background-repeat: no-repeat;
-webkit-background-size: cover;
-moz-background-size: cover;
-ms-background-size: cover;
-o-background-size: cover;
background-size: cover;
}