<a-entity id="#whale" gltf-model="#whale" position="0 1.5 -10" rotation="5 -50 0" scale="5 5 5"
animation="property: position; from: 0 1.5 -10; to: 0 0 0; startEvents: position; dur: 2000; delay: 2000;">
</a-entity>

document.querySelector(".enter").addEventListener('click',function () {
  document.querySelector("#whale").emit("position");
});