function keyPressed(event) {
const elements = document.querySelectorAll(`[data-key="${event.keyCode}"]`);
console.log(elements);
if (elements.length !== 0) {
const list = elements[0].classList;
list.add('playing');
elements[0].addEventListener('transitionend', () => {
list.remove('playing');
});
elements[1].currentTime = 0;
elements[1].play();
}
}
window.addEventListener('keydown', keyPressed);