Reaction speed test
Fav1. بعد النقر على زر "ابدأ"، راقب تغير لون المربع.
2. بمجرد أن يتغير لون المربع من الأبيض إلى لون آخر، انقر على زر "توقف".
3. بعد النقر على زر "توقف"، سيظهر وقت رد فعلك.
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