body {
  position: relative;
}

svg {
  position: absolute;
  top: 0;
  left: 50px;
  width: 860px;
  height: 500px;
}

#underlay {
  -webkit-filter: blur(4px);
  -moz-filter: blur(4px);
  -ms-filter: blur(4px);
  -o-filter: blur(4px);
  filter: blur(4px);
}