local alto = 6
local ancho = 8

function recargar()
    turtle.select(1)
    if turtle.getItemCount() == 0 then
        print("sin combustible")
        turtle.down()
        exit()
    else
        turtle.refuel(1)
        turtle.select(2)
    end
end

function plantarAlto()
    local count = 0
    while count < alto do
        count = count + 1
        turtle.placeDown()
        if not count == alto
            turtle.forward()
        end
    end
end

print("empezamos")
if turtle.getFuelLevel() < 50 then
    recargar()
    local ccount = 0

    while ccount < ancho do
        plantarAlto()

        if (ccount % 2 == 0) then
            turtle.turnLeft()
            turtle.forward()
            turtle.turnLeft()
        else
            turtle.turnRight()
            turtle.forward()
            turtle.turnRight()
        end

        ccount = ccount + 1
    end
end