Instance

[Xleniz]

I'm making an instance script, but nothing happens when I join queue with 2 characters (just to test, should be 8 later). can anyone help me fix it?:

playerinstance = {0, 0, 0, 0, 0, 0, 0, 0}
function tpcheck(cid)
	a = 0
	b = 0
	h = 0
	c = 0
	for _, pid in ipairs(getPlayersOnline()) do
		if(isPlayer(getPlayerByName(getPlayerName(pid)))) then
		if(getPlayerStorageValue(getPlayerByName(getPlayerName(pid)), 12399)==1) then
			playerinstance[a] = getPlayerByName(getPlayerName(pid))
			a = a + 1
		end
		end
	end
	
	if(a == 2) then
		while b < 2 do
			if(isPlayer(playerinstance[b])) then
				doTeleportThing(playerinstance[b], {x = 517, y = 2190, z = 7}, false)
			end
			b = b + 1
		end
	end
	
	while(h < 2) do
		if(isPlayer(playerinstance[h])) then
			if(getPlayerStorageValue(playerinstance[h], 12388)==1) then
				while(c < 2) do
				doTeleportThing(playerinstance[c], getTownTemplePosition(5), false)
				setPlayerStorageValue(playerinstance[c], 12388, 0)
				setPlayerStorageValue(playerinstance[c], 12399, 0)
				c = c + 1
				end
			end
		end
		h = h + 1
	end
	
	return true
end
function onThink(interval, lastExecution, thinkInterval)
	addEvent(tpcheck, 20000)
	return true
end