How can I count down from a number in seconds exactly?
My sister is always on the computer for too long now, and digging into my turn (sometimes by 1 hours 50 mins, as it was today) because we both have 1 computer with internet. As I have absolutelly no idea of what programme to make, apart from several complicated ones that I wont be able to do, I've decided to time her on the computer now. I hope it works, and It cant do that if you dont help me.
thankyou
i'm new so be nice