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const moveSpeed = 9;
var moveSpeedNow;
var ballSpeedX = 18;
var ballSpeedY = 0;
var rightPaddle = document.getElementById('right');
var leftPaddle = document.getElementById('left');
var field = document.getElementById('field');
var pressedKeysCodes = new Set();
var allCodes = [38, 40, 83, 87];
var startTime;
var limitedTime;

function go1() {

    if (pressedKeysCodes.has(40) && pressedKeysCodes.has(38)) {
        alert('Лол');
    }

    pressedKeysCodes.clear();
return;
}


addEventListener("keydown", function(event) {

    pressedKeysCodes.add(event.keyCode);

    go1();
});

---

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