Hey, I'm new to the RPG Maker programs and am right now using VX. I am trying to make a chest that gives you 1 potion but I don't know how to make it stop looping and just stay open so the character can't just keep getting potions from it. Can anybody help?

Right click on the place you want to place your chest, choose "Quick Event Creation" and then choose "Treasure Chest" (or use the shorcut ctrl+3)

Moving this to eventing!

You want the manual way or the automatic? XD

Manual ::
Make an event with 2 pages,
First page event graphic : Close treasure box
Second Page event graphic : treasure box opened

First page :: Text : You get Potion[x1]!!
Control Self switch [A] = ON

Second page :: " on the right side of the event page, TICK the self self switch.

Automatic ::
Right-click any grid on the events page and choose Quick Event > Treasure...

There simple

You obviously have it on auto or parallel process. That or you put the change item in a:
@>Loop:
@> [Here]
@>end
@>

Either way, I think you understand since Zakerot & Edante said, quick events: one step further from XP

I also recommend you read a few tutorials about switches and variables. There are more complicated events that you won't be able to make with quick eventing so it's best if you stop to read a few tutorials and practice with RPG maker Vx until you know how switches work.

Thank You to all your replies. I used the quick event and then modified it a little to do what I wanted. Thank You all again for helpinga n00b like me!