Lua Spell Script help

[gubbo123]

local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_HEALING)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
combat:setParameter(COMBAT_PARAM_DISPEL, CONDITION_PARALYZE)
combat:setParameter(COMBAT_PARAM_AGGRESSIVE, false)

function onGetFormulaValues(player, level, maglevel)
    return healingFormula(level, maglevel, 250, 50, 100)
end

combat:setCallback(CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValues")

function onCastSpell(creature, variant)
    return combat:execute(creature, variant)
end

how can be added storage 5001,1 with a 2 seconds of durantion when using this spell?

for example
when use the spell the player receive 5001,1 storage for 2 seconds, after 2 seconds the storage is changed for 5001,0