function show_player_number takes nothing returns nothing
 local player p=GetLocalPlayer()
 call DisplayTimedTextToPlayer(p, 0, 0, 60, I2S(GetPlayerId(p)) )
endfunction

function InitTest takes nothing returns nothing
 local trigger t=CreateTrigger()
 call TriggerAddAction(t, function show_player_number)
 call TriggerRegisterPlayerUnitEvent(t, Player(0), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(1), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(2), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(3), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(4), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(5), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(6), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(7), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(8), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(9), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(10), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 call TriggerRegisterPlayerUnitEvent(t, Player(11), EVENT_PLAYER_UNIT_SPELL_CAST, null)
 set t=null
endfunction

function show_player_number takes nothing returns nothing
    call DisplayTimedTextToPlayer(GetLocalPlayer(), 0, 0, 60, I2S(GetPlayerId(GetOwningPlayer(GetTriggerUnit()))))
endfunction