How to Play

Wait for the five red lights to turn on one by one. After all five lights are lit, the game adds a random delay before the lights go out.

Press the mouse button or press Space as soon as the lights go out.

Scoring

• A valid round measures the time between lights out and your mouse or key press.
• Pressing before lights out is a false start.
• The game tracks your best time, average time, and false starts across a short set of rounds.

Practice Tips

1. Keep your eyes on the lights, not the result panel.
2. Stay relaxed while waiting for the random delay.
3. Use the same input method each time so your results are easier to compare.
4. Try a few rounds, then rest. Reaction speed drops quickly when attention gets tired.

Most people improve after learning the rhythm, but the final random delay keeps the test from becoming a pure timing guess.