function attachEventsListeners() {
    let daysBtn = document.getElementById("daysBtn");
    let hoursBtn = document.getElementById("hoursBtn");
    let minutesBtn = document.getElementById("minutesBtn");
    let secondsBtn = document.getElementById("secondsBtn");

    let days = document.getElementById("days");
    let hours = document.getElementById("hours");
    let minutes = document.getElementById("minutes");
    let seconds = document.getElementById("seconds");

    function clearValues() {
        days.value = null;
        hours.value = null;
        minutes.value = null;
        seconds.value = null;
    }

    daysBtn.addEventListener('click', function () {
        let convertedHours = Number(days.value) * 24;
        let convertedMinutes = Number(convertedHours) * 60;
        let convertedSeconds = Number(convertedMinutes) * 60;
        let save = days.value;
        clearValues();
        days.value = save;
        hours.value = convertedHours;
        minutes.value = convertedMinutes;
        seconds.value = convertedSeconds;
    });

    hoursBtn.addEventListener('click', function () {
        let convertedDays = Number(hours.value) / 24;
        let convertedMinutes = Number(hours.value) * 60;
        let convertedSeconds = Number(convertedMinutes) * 60;
        let save = hours.value;
        clearValues();
        days.value = convertedDays;
        hours.value = save;
        minutes.value = convertedMinutes;
        seconds.value = convertedSeconds;
    });

    minutesBtn.addEventListener('click', function () {
        let convertedHours = Number(minutes.value) / 60;
        let convertedDays = Number(convertedHours) / 24;
        let convertedSeconds = Number(minutes.value) * 60;
        let save = minutes.value;
        clearValues();
        days.value = convertedDays;
        hours.value = convertedHours;
        minutes.value = save;
        seconds.value = convertedSeconds;
    });

    secondsBtn.addEventListener('click', function () {
        let convertedMinutes = Number(seconds.value) / 60;
        let convertedHours = convertedMinutes / 60;
        let convertedDays = Number(convertedHours) / 24;
        let save = seconds.value;
        clearValues();
        days.value = convertedDays;
        hours.value = convertedHours;
        minutes.value = convertedMinutes;
        seconds.value = save;
    });
}