How do I make my character take damage and respawn and die?

So i am making a platformer and I am trying to make an under the map level to go to the next level, but when my character falls off the map, nothing else happens. How do I make it so my character can take damage and also die/respawn?

edit: False alarm, I figured it out. Sorry for the waste of time.

Can you post a linkā€¦

For going to the next level, I would make a new (invisible [alpha 0]) object and make it go to the next level when you touch it. For damage, you need to make health and make deplete depending on what you want. Are you asking on how to make fall damage?