Welsh Language Reaction Time Test body { font-family: Arial, sans-serif; text-align: center; padding: 20px; } #word { font-size: 2em; margin: 40px 0; } button { padding: 10px 20px; font-size: 1em; margin-top: 20px; } .hidden { display: none; } Welsh Language Reaction Time Test Press E for Positive, I for Negative as quickly as possible. Start Test ify(data) // }); }