[SOLVED] Function Doesnt Change Parts Materials or Toggle Lighting?

i found out what the problem was, instead of doing it for all the children, it picks a random one and does the script for that one only while all the others just stay on, if anyone can help that would be awesome

Script

local function light(materialone, materialtwo, lighting)
    for _, child in ipairs(script.Parent:GetChildren()) do
        child:FindFirstChild("one").Material = materialone
        child:FindFirstChild("two").Material = materialtwo
        child:FindFirstChild("loit").PointLight.Enabled = lighting
    end
end

while task.wait() do
    print("a")
    wait(math.random(10,14))
    print("b")
    light(Enum.Material.SmoothPlastic, Enum.Material.SmoothPlastic, false)
    wait(.2)
    print("c")
    light(Enum.Material.Neon, Enum.Material.Neon, true)
    wait(.2)
    print("d")
    light(Enum.Material.SmoothPlastic, Enum.Material.SmoothPlastic, false)
    wait(.2)
    print("e")
    light(Enum.Material.Neon, Enum.Material.Neon, true)
    wait(.2)
    print("f")
    light(Enum.Material.SmoothPlastic, Enum.Material.SmoothPlastic, false)
    wait(math.random(10,14))
    print("g")
    light(Enum.Material.Neon, Enum.Material.Neon, true)
end