It's impossible to never go to sleep without dying. At 14, coffee is not healthy. You'll go to sleep and not even know it. Lack of sleep or insomnia can cause major health, hygiene and social problems

You're going to get hair on your chest from the coffee. Then you'll go crazy. Then you'll die.

It's not possible unless you increase your heart rate speed which is bad. For increasing your heart rate i mean drinking caffeine and what not. But eventually if you don't increase your heart rate you will eventually fall asleep. BUT if you don't to sleep you can kill yourself from being too tired. Your mind might tell your heart to stop beating. It could mean your death in some cases I have discussed from a health teacher.

your body recharges when you sleep. Its like a battery going dead; hence, you die!

you will feel depressed and not able to concentrate on things well.

your body will put itself to sleep eventually, to protect against organ death. you'll just pass out. if you could stay awake through that stage I guess it'd be possible to just keel over. there are stories of people who stay up for days a time, then die right after. but in a normal young person, they would pass out before the point of death.