[RMXP] Combining Two Items to make Animation - 'Setting Drink on Fire'

check this video for setup

http://youtu.be/hLox0ia8HDU

you get matches and a bottle of whiskey

and then... you combine the matches and the drink to make a fire.

but I don't know how to do that...?

Do you want it to be able to be combined anywhere, or just during one specific event?
There are several alchemy scripts that will allow you to combine items to create other items.

If it's for one event, you can use conditional branches in that event to check if the player has each item necessary. If both conditions are met, remove each item and go forward with the event (lighting the drink on fire and distracting him).

It should look something like

Conditional branch: Matches in inventory
       Conditional branch: alcohol in inventory

           remove item: matches
           remove item: alcohol

          (whatever you want to put for the actual event, like dialog, an animation, ect.)

        Else
           (the player says something like "I still need alcohol!)

        branch end
   Else
  (still need matches)
branch end