local events = {}
local effects = {}
local list = {CONST_ME_EXPLOSIONHIT, CONST_ME_EXPLOSIONAREA, CONST_ME_DRAWBLOOD, CONST_ME_HITBYFIRE, CONST_ME_MORTAREA, CONST_ME_GROUNDSHAKER}

local function e(cid, n)
	if isPlayer(cid) then
		if n > 0 then
			doSendMagicEffect(getThingPosition(cid), list[math.random(#list)])
			effects[cid] = addEvent(e, 1000, cid, n - 1)
		end
	else
		effects[cid] = nil
	end
	return true
end

function onStepIn(cid, item, position, lastPosition, fromPosition, toPosition, actor)
	if not isPlayer(cid) then
		return true
	end

	events[cid] = addEvent(doTeleportThing, 20 * 1000, cid, Position(32319, 32248, 9))
	effects[cid] = addEvent(e, 1000, cid, 20)
	doCreatureSay(cid, 'You must hold the barrier for the next 20 seconds.', TALKTYPE_MONSTER)
	return true
end


function onStepOut(cid, item, position, fromPosition)
	if not isPlayer(cid) then
		return true
	end

	if events[cid] then
		stopEvent(events[cid])
		stopEvent(effects[cid])
		doCreatureSay(cid, 'You haven\'t held the barrier for long enough.', TALKTYPE_MONSTER)
	end

	return true
end