Spread works only in 1 direction

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1

I am having issues in making spread, my friend gave me a good way of getting spread although he is offline right now I can’t solve the issue where the spread only works in 1 direction.

local SpreadRand = Random.new()
local function randomPointInCircle(dir, theta)
	local r0 = SpreadRand:NextNumber(0, 2 * math.pi)
	local r1 = math.acos(SpreadRand:NextNumber(1, math.cos(theta)))
	local c0 = CFrame.lookAt(Vector3.zero, dir) * CFrame.fromEulerAnglesXYZ(r0, 0, r1)
	return c0.LookVector
end
2

no help ___----------------------------