How do i make a solid ray reflect of objects at 90 degrees?

Hello i've been at this for a while now to little success. I want to have a raycast hit a block and reflect of it at 90 degrees. Below is the current mess of code i've come up with but it does not work as intended.

local function createBeam(part, point, surfacePoint)
    print(part.Position)
    if surfacePoint then
        print(surfacePoint)
          ray = Ray.new(point, surfacePoint * Vector3.new(1000,1000,1000))
    else
        print("no sp")
          ray = Ray.new(point, part.CFrame.lookVector * Vector3.new(1000,1000,1000))
    end
    local newPart, newPoint, newSurfacePoint = workspace:FindPartOnRay(ray)

    local beam = Instance.new("Part", workspace:WaitForChild("Beams"))
    beam.BrickColor = BrickColor.new("Bright red")
    beam.FormFactor = "Custom"
    beam.Material = "Neon"
    beam.Transparency = 0.25
    beam.Anchored = true
    beam.Locked = true
    beam.CanCollide = false

    local distance = (point - newPoint).magnitude
    beam.Size = Vector3.new(0.3, 0.3, distance)
    beam.CFrame = CFrame.new(point, newPoint) * CFrame.new(0, 0, -distance / 2)

    if newPart then
        wait(0.5)
        createBeam(newPart, newPoint, newSurfacePoint)
    else
        print("Laser end")
    end
    wait(0.5)
end