for x = 1, 20 do
    for y = 1, 20 do
        local NOISE = math.noise(x / 10, y / 50, math.random(1, 1000000))
        local RAN = math.random(1, 2)
        local PA = Instance.new("Part")
        PA.Size = Vector3.new(3, 3, 3)
        PA.CFrame = CFrame.new(x * 3, y * 3, NOISE)
        PA.Material = Enum.Material.SmoothPlastic
        if RAN == 1 then
            PA.BrickColor = BrickColor.new("Really red")
        elseif RAN == 2 then
            PA.BrickColor = BrickColor.new("Black")
        end
        PA.Parent = game.Workspace.Terrain
    end
end