Newbie trigger not working properly

[shinami]

Ok so here's the trigger.. i only started jass yesterday so there must be a lot of wrong stuff here:

//===========================================================================
function Trig_Untitled_Trigger_004_Actions takes nothing returns nothing
    call AddSpecialEffectTargetUnitBJ( "left hand", GetAttackedUnitBJ(), "Abilities\\Spells\\Orc\\Purge\\PurgeBuffTarget.mdl" )
endfunction

//===========================================================================
function InitTrig_Untitled_Trigger_004 takes nothing returns nothing
    set gg_trg_Untitled_Trigger_004 = CreateTrigger(  )
    call TriggerRegisterUnitLifeEvent( gg_trg_Untitled_Trigger_004, gg_unit_nchw_0012, LESS_THAN, 150.00 )
    call TriggerAddAction( gg_trg_Untitled_Trigger_004, function Trig_Untitled_Trigger_004_Actions )
endfunction

function Trig_Untitled_Trigger_005 takes nothing returns nothing
local effect s= AddSpecialEffect("PurgeBuffTarget.mdl", 212, 212)
local unit a= gg_unit_nchw_0012
call AddSpecialEffectTargetUnitBJ( "left hand" , GetAttackedUnitBJ(), "Abilities\\Spells\\Human\\Thunderclap\\ThunderClapCaster.mdl" )
call DestroyEffect (s)
set s= null

endfunction

function UnitLife takes nothing returns nothing
set gg_trg_Untitled_Trigger_005 = CreateTrigger(  )
call TriggerRegisterUnitLifeEvent( gg_trg_Untitled_Trigger_004, gg_unit_nchw_0012, GREATER_THAN_OR_EQUAL, 70.00 )
call TriggerAddAction( gg_trg_Untitled_Trigger_005, function Trig_Untitled_Trigger_005 )

endfunction

The part that's not working properly is this

function Trig_Untitled_Trigger_005 takes nothing returns nothing
local effect s= AddSpecialEffect("PurgeBuffTarget.mdl", 212, 212)
local unit a= gg_unit_nchw_0012
call AddSpecialEffectTargetUnitBJ( "left hand" , GetAttackedUnitBJ(), "Abilities\\Spells\\Human\\Thunderclap\\ThunderClapCaster.mdl" )
call DestroyEffect (s)
set s= null

endfunction

Nor does the purge dissapear nor does the thunderclap appear.. Solutions?

 

[T.s.e]

function Trig_Untitled_Trigger_005 takes nothing returns nothing
//Not too sure about the path here...
local unit a= gg_unit_nchw_0012
call DestroyEffect( AddSpecialEffect("Abilities\\Spells\\Orc\\Purge\\PurgeBuffTarget.mdl", 212, 212))
//TargetUnitBJ... This will immediately destroy the special effect, but it still shows.
call DestroyEffect( AddSpecialEffectTarget( "Abilities\\Spells\\Human\\Thunderclap\\ThunderClapCaster.mdl", a, "hand left"))
set a = null

endfunction