},
animateMove: function(move, callback) {
let startSquare = document.getElementById(getSquareId(move.start));
let endSquare = document.getElementById(getSquareId(move.end));
let rectStart = startSquare.getBoundingClientRect();
let rectEnd = endSquare.getBoundingClientRect();
},
animateMove: function(move, callback) {
let startSquare = document.getElementById(getSquareId(move.start));
let endSquare = document.getElementById(getSquareId(move.end));
let rectStart = startSquare.getBoundingClientRect();
let rectEnd = endSquare.getBoundingClientRect();