javascript:(function() {

  var svgNS = "http://www.w3.org/2000/svg";
  var svg = document.createElementNS(svgNS, "svg");
  svg.style.position = "fixed";
  svg.style.width = "0";
  svg.style.height = "0";
  svg.style.visibility = "hidden";

  var filter = document.createElementNS(svgNS, "filter");
  filter.id = "filterID";

  var animate = document.createElementNS(svgNS, "animate");
  animate.setAttribute("attributeName", "baseFrequency");
  animate.setAttribute("dur", "30s");
  animate.setAttribute("values", "0.02;0.03;0.02");
  animate.setAttribute("repeatCount", "indefinite");
  
  var turbulence = document.createElementNS(svgNS, "feTurbulence");
  turbulence.setAttribute("type", "turbulence");
  turbulence.setAttribute("baseFrequency", "0.02");
  turbulence.setAttribute("numOctaves", "2");
  turbulence.setAttribute("result", "turbulence");
  turbulence.setAttribute("seed", Math.random());
  turbulence.appendChild(animate);

  var animate2 = document.createElementNS(svgNS, "animate");
  animate2.setAttribute("attributeName", "scale");
  animate2.setAttribute("dur", "61.3s");
  animate2.setAttribute("values", "10;50;10");
  animate2.setAttribute("repeatCount", "indefinite");

  var displacementMap = document.createElementNS(svgNS, "feDisplacementMap");
  displacementMap.setAttribute("in2", "turbulence");
  displacementMap.setAttribute("in", "SourceGraphic");
  displacementMap.setAttribute("scale", "1.5");
  displacementMap.setAttribute("xChannelSelector", "R");
  displacementMap.setAttribute("yChannelSelector", "G");
  displacementMap.appendChild(animate2);

  filter.appendChild(turbulence);
  filter.appendChild(displacementMap);

  svg.appendChild(filter);
  document.body.appendChild(svg);

  document.body.style.filter = "url(#filterID)";

})();