Windows Spell creating

[Cornex]

Hello, well i are new to create spells.

I wonder now how do i add so it gives more dmg per lvl/magic lvl you have..

The train script i tried with:

-- =============== COMBAT VARS ===============
-- Areas/Combat for 0ms
local combat0_Brush = createCombatObject()
setCombatParam(combat0_Brush, COMBAT_PARAM_EFFECT, CONST_ME_MORTAREA)
setCombatParam(combat0_Brush, COMBAT_PARAM_TYPE, COMBAT_DEATHDAMAGE)
setCombatArea(combat0_Brush,createCombatArea({{1, 1, 1, 1, 1, 1, 1},
{1, 1, 1, 1, 1, 1, 1},
{1, 1, 1, 1, 1, 1, 1},
{1, 1, 1, 2, 1, 1, 1},
{1, 1, 1, 1, 1, 1, 1},
{1, 1, 1, 1, 1, 1, 1},
{1, 1, 1, 1, 1, 1, 1}}))
setAttackFormula(combat0_Brush, COMBAT_FORMULA_LEVELMAGIC, 21, 23, 22, 24)

-- =============== CORE FUNCTIONS ===============
local function RunPart(c,cid,var,dirList,dirEmitPos) -- Part
	if (isCreature(cid)) then
		doCombat(cid, c, var)
		if (dirList ~= nil) then -- Emit distance effects
			local i = 2;
			while (i < #dirList) do
				doSendDistanceShoot(dirEmitPos,{x=dirEmitPos.x-dirList[i],y=dirEmitPos.y-dirList[i+1],z=dirEmitPos.z},dirList[1])
				i = i + 2
			end		
		end
	end
end

function onCastSpell(cid, var)
	local startPos = getCreaturePosition(cid)
	RunPart(combat0_Brush,cid,var)
	return true
end

Thanks in advance