stripMine

function stripMine()
    turtle.refuel()
    for i = 0, 10,1 do
        threeTimesThree()
        if turtle.getFuelLevel() == 0 then
            return
        end
    end
    -- Return
    turtle.turnRight()
    turtle.turnRight()
    for i = 0, 10,1 do
        fwd()
    end
end

function threeTimesThree()
    --0 1 2
    --3 4 5
    --6 7 8
    --Start 4
    digFwd()
    -- 3
    turtle.turnLeft()
    digFwd()
    -- 0
    digUp()

    turtle.turnRight()
    turtle.turnRight()
    -- 1
    digFwd()
    -- 2
    digFwd()
    -- 5
    digDown()
    -- 8
    digDown()
    turtle.turnLeft()
    turtle.turnLeft()
    -- 7
    digFwd()
    -- 6
    digFwd()
    turtle.turnRight()
    turtle.up()
    turtle.turnRight()
    fwd()
    turtle.turnLeft()
end

function fwd()
    if turtle.detect() then
        return
    else
        turtle.forward()
    end
end

function digFwd()
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
end

function digUp()
    if turtle.detectUp() then
        turtle.digUp()
    end
    turtle.up()
end

function digDown()
    if turtle.detectDown() then
        turtle.digDown()
    end
    turtle.down()
end

stripMine()