= '6px solid transparent';
                marker.style.borderTop = '8px solid #ff0000';
                marker.style.transform = 'translateX(-6px)'; // Center the triangle
                marker.style.zIndex = '1000';
                marker.style.filter = 'drop-shadow(0 0 4px #ff0000)';
                timeline.appendChild(marker);
            }
        }

        function startTimeUpdate() {
            setInterval(() => {
                currentTime = new Date();
                document.getElementById('