mining.lua

turtle.refuel()

width = 3
height = 3
levels = 3
turn = 0

for l = 0, levels, 1 do
    for i = 0, width, 1 do
        for j = 0, width, 1 do
            while turtle.detect() do
                turtle.dig()
            end

            turtle.forward()
        end
        if turn == 0 then

            turtle.turnRight()
            while turtle.detect() do
                turtle.dig()
            end
            turtle.forward()
            turtle.turnRight()
            turn = 1
        else
            turtle.turnLeft()
            while turtle.detect() do
                turtle.dig()
            end
            turtle.forward()
            turtle.turnLeft()
            turn = 0
        end
    end
    turtle.digDown()
    turtle.down()

end