Toralord is right, you can just set a number then use subevents to check that number, like a series of Ifs following on each other.
Just make the events in the easiest way possible and don't worry about inefficiency - events add so much overhead that it's kind of ridiculous to worry about efficiency. You could set up an if-else-if-else-if event chain, but paradoxically, that might be less efficient, because the 'else' event does some special processing.