globals
boolean bool = true
endglobals
//---------------------------------
function X_Condition takes nothing returns boolean
  return bool
endfunction

function X_Action takes nothing returns nothing
...
set bool = false
endfunction
//---------------------------------
function Y_Condition takes nothing returns boolean
  return (bool and GetUnitAbilityLevel(...)>0)
endfunction
//---------------------------------
function Z_Condition takes nothing returns boolean
  return (bool and GetUnitAbilityLevel(...)>0)
endfunction

function X_Action takes nothing returns nothing
...
set bool = false
endfunction

function X_Action_Timer takes nothing returns nothing
    ...
    set bool = false
    call DestroyTimer(GetExpiredTimer())
endfunction
function X_Action takes nothing returns nothing
    call TimerStart(CreateTimer(), 0, false, function X_Action_Timer)
endfunction

local trigger trig = CreateTrigger()
call TriggerRegisterAnyEvent(trig, ...)
call TriggerAddCondition(trig, Condition( function Trig_Conditions))
call TriggerAddAction(trig, function Trig_Actions1)
call TriggerAddAction(trig, function Trig_Actions2)
call TriggerAddAction(trig, function Trig_Actions3)

func Action
 if A then
  // a actions
 endif
 if B then
  // b actions
 endif
 if C then
  // c actions
 endif
endfunc