local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_GREEN_RINGS)
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_POISONDAMAGE)

local arr = {
 {1, 1, 1},
 {1, 2, 1},
 {1, 1, 1},
}

local area = createCombatArea(arr)
setCombatArea(combat, area)

function onCastSpell(cid, var)
	return doCombat(cid, combat, var)
end