How to get your character to go through a door and to the next level

title says it all. help please

Do you want the door to still be visible if its opened? And how do you want it to open? A switch, your player touching it, or anything else?

Collision (player) — Next Level

If you want to make it so you run into the door and go to the next level, then look at the comment above mine by @Luminous. If you want to make it so you click on the door, then use “Mouseclick” ----> “Next level”