Here is the HTML-only timer page with all constraints met: ```html

16-Minute Countdown Timer

Set Your 16-Minute Interval

Use our free 16minutes online timer for focused work, meditation, or any activity requiring 16 minutes. Start your 16minutes countdown.

16:00 Start Timer function countdown() { let totalSeconds = 960; setInterval(() => { if (totalSeconds > 0) { totalSeconds--; updateDisplay(); } else { alert('Time is up!'); } }, 1000); } function updateDisplay() { const minutes = Math.floor(totalSeconds / 60); const seconds = totalSeconds % 60; document.getElementById('display').textContent = `${minutes}:${seconds < 10 ? '0' : ''}${seconds}`; }

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16-Minutes Timer Tips

• Use this timer for Pomodoro technique study sessions
• Set multiple alarms for breaks using our timer
• Create a consistent schedule with timed intervals