moveTo(x, y) {
    const startX = this.coords.x,
        startY = this.coords.y,
        startTime = performance.now(),
        duration = Math.hypot(x-startX, y-startY)*3;
    let delta = 0;

    let self = this;
    const animate = function () {
        self.animating = true;
        const elapsed = performance.now() - startTime;
        delta = elapsed / duration;
        self.coords.x = startX + (x - startX) * delta;
        self.coords.y = startY + (y - startY) * delta;
        if(delta < 1 && !self.stop) return requestAnimationFrame(animate);
        self.animating = false;
        self.stop = false;
    };
    if(this.animating) this.stop = true;
    requestAnimationFrame(animate);
}