Как выполнять функцию 3 секунды?

function activeShield() {
        var shield = new Sprite(textureShield);
        activeBumpHit = true;
        shield.width = 155;
        shield.height = 155;
        shield.y = gopnik.y - 680;
        arrShield.push(shield);
        gopnik.addChild(shield);
    }

    document.addEventListener('keydown', function (e) {
        if (e.keyCode === 83 && arrShield.length < 1) {
            activeShield();
            console.log(activeBumpHit);
        }
    });