cleanDown.lua

DIG = 0
PLACE = 0
MOVE = 0

function CleanTop()
    turtle.turnLeft()
    if Eval(turtle.inspect()) then
        Replace()
    end
    turtle.turnRight()
    turtle.turnRight()
    if Eval(turtle.inspect()) then
        Replace()
    end
    turtle.turnLeft()
    if Eval(turtle.inspectDown()) then
        ReplaceDown()
    end
end

function Eval(succ, block)
    if block.name == "minecraft:stone" and block.metadata == 0 then
        return false
    elseif block.name == "minecraft:torch" then
        return false
    elseif block.name == "minecraft:birch_planks" then
        return false
    else
        return true
    end
end

function Replace()
    turtle.dig()
    DIG = DIG + 1
    turtle.select(1)
    placed = turtle.place()
    if not placed then
        Replace()
    end
    PLACE = PLACE + 1
end

function ReplaceUp()
    turtle.digUp()
    DIG = DIG + 1
    turtle.select(1)
    turtle.placeUp()
    PLACE = PLACE + 1
end

function ReplaceDown()
        turtle.digDown()
        DIG = DIG + 1
        turtle.select(1)
        turtle.placeDown()
        PLACE = PLACE + 1
end

function Run()
    turtle.turnLeft()
    turtle.turnLeft()
    while not turtle.detect() do
        turtle.forward()
    end
end

function SetStop()
    turtle.select(2)
    turtle.place()
end

function Empty()
    for block=3, 16 do
        turtle.select(block)
        turtle.drop()
    end
end
Run()
turtle.select(1)
turtle.dig()
while turtle.getItemCount() >= 3 and not turtle.detect() do
    CleanTop()
    turtle.forward()
    MOVE = MOVE + 1
end
SetStop()
Run()
Empty()
print('Blocks Placed: ' .. PLACE)
print('Moved: ' .. MOVE)
print('Blocks Broken: ' .. DIG)
print('Fuel: ' .. turtle.getFuelLevel())