Onevent

onevent [EventName] { event body } endevent

Used outside of all actors, onevent defines a special block of CON code to be executed when a specific event happens in the game code. endevent is used to end the statement. The hardcoded portion of many events can be canceled by setting the gamevar RETURN to -1 inside the aforementioned block of code, permitting only the custom-coded one to run.

gamevar MYMEDPACK 100 1

onevent EVENT_TURNAROUND
{
    palfrom 32 0 0 32
    addphealth 5
    subvar MYMEDPACK 5
    setvar RETURN -1
}
endevent

See the EDuke32 event list for a list of all currently valid events in Eduke32.