Perlin Noise

local seed = Random.new():NextNumber(1, 100000)
for x = -50, 50 do
    for z = -50, 50 do
        local noise = math.noise(seed, x/10, z/10) * 5
        local part = Instance.new("Part")
        part.Anchored = true
        part.Size = Vector3.new(1,1,1)
        part.Position = Vector3.new(x, noise, z)
        part.Parent = game.Workspace
    end
end