1<div id="background-container" class="transparent"> 2 <svg id="background" xmlns="http://www.w3.org/2000/svg" 3 xmlns:xlink="http://www.w3.org/1999/xlink"> 4 <defs> 5 <rect id="rectangular-hole-pattern" class="hole transparent"/> 6 <circle id="round-hole-pattern" class="hole transparent"/> 7 <mask id="mask" maskUnits="objectBoundingBox" 8 maskContentUnits="userSpaceOnUse"> 9 <rect width="100%" height="100%" fill="white"/> 10 </mask> 11 </defs> 12 <rect class="fill" width="100%" height="100%" mask="url(#mask)"/> 13 </svg> 14</div> 15