Basic Mining Program - Lua

local height = 4
local depth = 64
local torchSpace = 8


-- Fonction de mouvement
function UP()
    while (turtle.detect()) do
        turtle.dig()
        os.sleep(0.5)
    end
    while (turtle.detectUp()) do
        turtle.digUp()
        os.sleep(0.5)
    end
    turtle.up()
end

function TURN()
    while (turtle.detect()) do
        turtle.dig()
        os.sleep(0.5)
    end
    turtle.turnRight()
    turtle.turnRight()
    while (turtle.detect()) do
        turtle.dig()
        os.sleep(0.5)
    end
end

function DOWN()
    turtle.down()
    while (turtle.detect()) do
        turtle.dig()
        os.sleep(0.5)
    end
end

function FORWARD()
    while (turtle.detect()) do
        turtle.dig()
        os.sleep(0.5)
    end
    while (not turtle.forward()) do
        turtle.dig()
        os.sleep(0.5)
    end
end


-- Rechargement
function REFUEL()
    turtle.select(1)
    if (turtle.refuel(1)) then
        return true
    else
        for i=2, 16 do
            turtle.select(i)
            if (turtle.refuel(1)) then
                return true
            end
        end
    end
    return false
end

function TORCH()
    for i=0, 1 do turtle.turnLeft() end
    turtle.select(2)
    turtle.place()
    for i=0, 1 do turtle.turnRight() end
end


-- Séquence principale
function STEP(advencement)
    turtle.turnLeft()

    -- Montée
    for i=1, height-1 do
        UP()
    end

    -- Retournement
    TURN()

    -- Descente
    for i=1, height-1 do
        DOWN()
    end

    turtle.turnLeft()

    -- Avancement
    if (advencement > 1) then
        FORWARD()
    end

    -- Torches
    if (advencement % torchSpace == 0) then
        TORCH()
    end
end


-- Boucle principale
for i=depth, 1, -1 do
    if (turtle.getFuelLevel() < (height*height)-1) then
        if REFUEL() then
            STEP(i)
        else
            os.sleep(20)
            i = i + 1
            print("Waiting for fuel")
        end
    else
        STEP(i)
    end
end