Spell Target

[mackerel]

How do you make the target spell to hit random locations around the target and the actual target?

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_ENERGYDAMAGE)
setCombatParam(combat, COMBAT_PARAM_EFFECT, 7)
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, 5)
setCombatFormula(combat, COMBAT_FORMULA_LEVELMAGIC, -0.2, 1, -0.3, 1)
function onCastSpell(cid, var)
    addEvent(doCombat, 200, cid, combat, var)
    addEvent(doCombat, 400, cid, combat, var)
    addEvent(doCombat, 600, cid, combat, var)
    return doCombat(cid, combat, var)
end

This one hits 4 times but, unfortunately the same spot :\

Here's one of many possible outcomes I want to achieve, it can even hit twice the same spot as long as it is randomized