function ClientStarts()
marker1 = createMarker ( x, y, z, "corona", size, r, g, b, visibility )
end
addEventHandler( "onClientResourceStart", getResourceRootElement(getThisResource()), ClientStarts )

function onMarkerHit( hitPlayer, matchingDimension )
	if hitPlayer ~= You then
		return
end

	if source == marker1 then
	local sound = playSound ("yourfile.mp3")
	setSoundVolume(sound, 1)
	end
end

addEventHandler ( "onClientMarkerHit", getRootElement(), onMarkerHit )