Can anyone show me a proper way for setTimer

[Hero192]

Hey guys, I am asking for a proper way for usage setTimer on this function

I want to set the timer about 2 secs ( 2000miliseconds) but I failed

function onPlaySound() 
    local sound = playSound("file/sound.wav")  
    setSoundVolume(sound, 0.5)  
end 

[Ab-47]

function onPlaySound() 
    local sound = playSound("file/sound.wav")  
    setSoundVolume(sound, 0.5)  
end 
setTimer(onPlaySound, 2000, 0) 

This?

[ViRuZGamiing]

function onPlaySound() 
    local sound = playSound("file/sound.wav") 
    setSoundVolume(sound, 0.5) 
    setTimer ( function() 
        stopSound(sound) 
    end, 2000, 1) 
end 

EDIT. This is to stop after 2000 ms, example above will start after 2000 ms