Miner1

function refuel()
    if turtle.getFuelLevel() < 1 then
        print("Attempting to Refuel!")
        if ~turtle.refuel(10) then
            print("failed to refuel")
        end
    end
end

function torch(x)
    if x % 5 == 0 then
        tmp=turtle.getSelectedSlot()
        turtle.turnRight()
        turtle.select(2)
        turtle.dig()
        turtle.place()
        turtle.dig()
        turtle.turnRight()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        turtle.select(tmp)
    end
end

function dig(n)
    for i=0, n-1 do
        refuel()
        if(turtle.detect()) then
            turtle.dig()
        end
        turtle.forward()
        if(turtle.detectUp()) then
            turtle.digUp()
        end
    end
end

function cleanup()
    for i=0, 3 do
        dig(1)
        turtle.turnRight()
    end
    turtle.turnLeft()
    dig(3)
    turtle.turnLeft()
end

function mineShaft(length)
    for i=0, length do
        dig(1)
        torch(i)
    end
    dig(length)
    turtle.turnRight()
    dig(3)
    turtle.turnRight()
    dig(length)
end

function mine(x, y)
    for i=0, y-1 do
        mineShaft(x)
        cleanup()
    end
    turnRight()
    for i=0, (6*y)-1 do
        turtle.forward()
    end
end

mine(4, 3)