How can i make perlin noise for cave generation?

math.randomseed(tick())
local part = Instance.new("Part",workspace)
part.Anchored = true
local seed = math.random(1, 10e6)
local scale = 200
for x=1,scale do
    for z=1,scale do
        for y = 1,scale do
        local new = part:Clone()
        new.Parent = workspace
        new.Anchored = true
        new.Size = Vector3.new(5,5,5)   
        -----------------------------
        local XIn = math.noise(y/scale,y/scale,seed)
        local YIn = math.noise(x/scale,y/scale,seed)
        local ZIn = math.noise(x/scale,y/scale,seed)
        wait()
        new.CFrame = CFrame.new(XIn*scale,YIn*scale*2.5,ZIn*scale)
        ------------------------------      
        end

    end


end

I used an article with a Wiki, but I get a similar figure over and over again. How can I make perlin worms to generate caves?