.stoerer{
    position: absolute;
    top: 50%;
    right: 10vw;
    width: 10vw;
    height: 10vw;
    z-index: 1000;
}
@media screen and (max-width: 767px) {
  .stoerer{
    top: auto;
        bottom: -10vh;
  right: auto;
   left: 10vw;
  width: 25vw;
    height: 25vw;
  }
}