Cooldown for monster levers

[God Mythera]

Hello and im wondering if its possible to add a cooldown for my private spawn levers? id like to get a 30 second cooldown before someone can use the lever again, these are the scripts

function onUse(cid, item, fromPosition, itemEx, toPosition)

local fromPos = {x = toPosition.x - 10, y = toPosition.y - 10, z = toPosition.z} 
local toPos = {x = toPosition.x + 10, y = toPosition.y + 10, z = toPosition.z}

local amount = 0
for x = fromPos.x, toPos.x do
for y = fromPos.y, toPos.y do
for z = fromPos.z, toPos.z do
local monster = getTopCreature({x=x,y=y,z=z}).uid
if(isCreature(monster) == TRUE) then
if getCreatureName(monster) == "Diablo" then
amount = amount+1
end
end 
end
end
end

if amount >= 1 then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF) 
doPlayerSendCancel(cid, "You need to kill the Diablo first before you can summon one again.")
return true
else
doSummonCreature("Diablo", {x = toPosition.x - 1, y = toPosition.y + 1, z = toPosition.z})
doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, "You have summoned the Diablo.")
doSendMagicEffect(getThingPos(cid), CONST_ME_MAGIC_BLUE)
end
return true
end

function onUse(cid, item, fromPosition, itemEx, toPosition)

local fromPos = {x = toPosition.x - 10, y = toPosition.y - 10, z = toPosition.z} 
local toPos = {x = toPosition.x + 10, y = toPosition.y + 10, z = toPosition.z}

local amount = 0
for x = fromPos.x, toPos.x do
for y = fromPos.y, toPos.y do
for z = fromPos.z, toPos.z do
local monster = getTopCreature({x=x,y=y,z=z}).uid
if(isCreature(monster) == TRUE) then
if getCreatureName(monster) == "Three Headed Beast" then
amount = amount+1
end
end 
end
end
end

if amount >= 1 then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF) 
doPlayerSendCancel(cid, "You need to kill the Three Headed Beast first before you can summon one again.")
return true
else
doSummonCreature("Three Headed Beast", {x = toPosition.x - 1, y = toPosition.y + 1, z = toPosition.z})
doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, "You have summoned the Three Headed Beast.")
doSendMagicEffect(getThingPos(cid), CONST_ME_MAGIC_BLUE)
end
return true
end

 

[Critico]

function onUse(cid, item, fromPosition, itemEx, toPosition)
local fromPos = {x = toPosition.x - 10, y = toPosition.y - 10, z = toPosition.z} 
local toPos = {x = toPosition.x + 10, y = toPosition.y + 10, z = toPosition.z}
local storage,time = 185489, 30
local amount = 0
for x = fromPos.x, toPos.x do
for y = fromPos.y, toPos.y do
local pos = {x=x, y=y, z=fromPos.z}
local m = getTopCreature(pos).uid
if m ~= 0 and isMonster(m) and getCreatureName(m) == "Diablo" then 
amount = amount+1
end
end
end
if getPlayerStorageValue(cid, storage) >= os.time() then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF) 
doPlayerSendCancel(cid, "wait "..getPlayerStorageValue(cid, storage) - os.time().." seconds to use lever again .") return true
elseif amount >= 1 then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF) 
doPlayerSendCancel(cid, "You need to kill the Diablo first before you can summon one again.") return true
else
doSummonCreature("Diablo", {x = toPosition.x - 1, y = toPosition.y + 1, z = toPosition.z})
doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, "You have summoned the Diablo.")
doSendMagicEffect(getThingPos(cid), CONST_ME_MAGIC_BLUE)
setPlayerStorageValue(cid, storage, os.time()+time) 
end
return true
end

 

[God Mythera]

function onUse(cid, item, fromPosition, itemEx, toPosition)
local fromPos = {x = toPosition.x - 10, y = toPosition.y - 10, z = toPosition.z}
local toPos = {x = toPosition.x + 10, y = toPosition.y + 10, z = toPosition.z}
local storage,time = 185489, 30
local amount = 0
for x = fromPos.x, toPos.x do
for y = fromPos.y, toPos.y do
local pos = {x=x, y=y, z=fromPos.z}
local m = getTopCreature(pos).uid
if m ~= 0 and isMonster(m) and getCreatureName(m) == "Diablo" then
amount = amount+1
end
end
end
if getPlayerStorageValue(cid, storage) >= os.time() then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF)
doPlayerSendCancel(cid, "wait "..getPlayerStorageValue(cid, storage) - os.time().." seconds to use lever again .") return true
elseif amount >= 1 then
doSendMagicEffect(getThingPos(cid), CONST_ME_POFF)
doPlayerSendCancel(cid, "You need to kill the Diablo first before you can summon one again.") return true
else
doSummonCreature("Diablo", {x = toPosition.x - 1, y = toPosition.y + 1, z = toPosition.z})
doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, "You have summoned the Diablo.")
doSendMagicEffect(getThingPos(cid), CONST_ME_MAGIC_BLUE)
setPlayerStorageValue(cid, storage, os.time()+time)
end
return true
end

ty so much ;d