let endSquare = document.getElementById(getSquareId(move.end));
let rectStart = startSquare.getBoundingClientRect();
let rectEnd = endSquare.getBoundingClientRect();
let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
let movingPiece =
document.querySelector("#" + getSquareId(move.start) + " > img.piece");
let endSquare = document.getElementById(getSquareId(move.end));
let rectStart = startSquare.getBoundingClientRect();
let rectEnd = endSquare.getBoundingClientRect();
let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
let movingPiece =
document.querySelector("#" + getSquareId(move.start) + " > img.piece");