SOURCE

<svg width="500px" height="500px">
  <path id="path"></path>
</svg>

#path{
  /* */
 
  animation:move 3s linear infinite alternate;
}
@keyframes move{
  0%{
  d:path("M161.5,81.5c1.4,45.5-52,81-83.5,80C36.49,160.18.5,116.5.5,84,.5,40.12,36.5.5,78.5.5,106.52.5,159.5,16.5,161.5,81.5Z") 
  }
  100%{
  d:path("M170.84,91.65c45.35,3.92-78-5-83.5,80-2.68,41.45,3.5-81-77.5-77.5-43.84,1.89,81-3.5,78-83.5C86.15-34.39,89.84,84.65,170.84,91.65Z")  
  }
}