Corridor

if turtle.getFuelLevel() < 1000 then
    turtle.select(16)
    turtle.refuel()
    turtle.select(1)
end
function breakRight()
    for i=1, 1 do
        turtle.dig()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        turtle.dig()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        turtle.dig()
    end
end

function breakLeft()
    for i=1, 1 do
        turtle.dig()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        turtle.dig()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        turtle.dig()
    end
end
print("Corridor length: ")
local length = tonumber(read())
for i=1,length do
    breakLeft()
    turtle.up()
    breakRight()
    turtle.up()
    breakLeft()
    turtle.up()
    breakRight()
    turtle.up()
    breakLeft()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.turnLeft()
    turtle.down()
    turtle.down()
    turtle.down()
    turtle.down()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
    turtle.forward()
    turtle.turnRight()
end