mine3

function callError(errorString)
    shell.exit()
end

function digUp()
    while turtle.detectUp() do
        turtle.digUp()
    end
end

function moveForward(maxTries)
    for i = 0, maxTries, 1 do
        if turtle.forward() then
            return
        end

        turtle.dig()

        sleep(1)
    end

    callError("Move Forward Error")
end

function moveUp(maxTries)
    for i = 0, maxTries, 1 do
        if turtle.up() then
            return
        end

        turtle.digUp()

        sleep(1)
    end

    callError("Move Up Error")
end

function makeATurn(turn)
    if turn then
        turtle.turnRight()
        turtle.dig()
        moveForward(10)
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.dig()
        moveForward(10)
        turtle.turnLeft()
    end
end

function makeATurnUp()
    moveUp(10)
    digUp()
    moveUp(10)

    turtle.turnLeft()
    turtle.turnLeft()
end

function mineARow(amount)
    for i = 0, amount - 1, 1 do
        if i < amount - 1 then
            turtle.dig()
            digUp()
            moveForward(10)
        end

        digUp()
    end
end

function mineLastRow(amount)
    for i = 0, amount - 1, 1 do
        if i < amount - 1 then
            turtle.dig()
            moveForward(10)
        end

        digUp()
    end
end

function mineALayer(amount, length, turn)
    for i = 0, length - 1, 1 do
        mineARow(amount)

        if i < length - 1 then
            makeATurn(turn)

            turn = not turn
        end
    end

    return turn
end

function mineLastLayer(amount, length, turn)
    for i = 0, length - 1, 1 do
        mineLastRow(amount)

  if i < length - 1 then
     makeATurn(turn)

     turn = not turn
  end
    end
end

function mine(x, y, z)
    turn = true

    turtle.dig()
    moveForward(10)

    for i = 0, y - 1, 2 do
        if i == y - 1 then
             print(turn)
    mineLastLayer(z, x, turn)
        return
        end

        turn = mineALayer(z, x, turn)

        makeATurnUp()
    end
end

function startMining()
    print("This turtle is mining from the lower left to the upper right!\n")
    print("X is the width\n")
    print("Y is the height\n")
    print("Z is the depth\n")

    print("X:")
    x = tonumber(read())

    print("Y:")
    y = tonumber(read())

    print("Z:")
    z = tonumber(read())

    print("You entered: X = " .. x .. "Y = " .. y .. "Z = " .. z .. "\n")
    print("Is that correct: Y/N")

    choice = ""

    while true do
        shell.run("clear")
        print(choice .. " is not a valid input! Only use Y or N\n\n")

        print("You entered: X = " .. x .. "Y = " .. y .. "Z = " .. z .. "\n")
        print("Is that correct: Y/N")

        choice = read()

  if choice == "Y" or choice == "N" then
    break
  end
    end

    if choice == "Y" then
        mine(x, y, z)
    end
end

startMining()