mine_this_block (CC Turte)

local _,target = turtle.inspect()

function isFiller(block)
    return not (block.name == target.name);
end

function checkBlock(direction)
    if direction == 0 then
        local isBlock, block = turtle.inspectDown();
        if isBlock and not isFiller(block) then
            turtle.digDown()
            turtle.down()
            search()
            turtle.up()
        end
    elseif direction == 1 then
        local isBlock, block = turtle.inspect();
        if isBlock and not isFiller(block) then
            while not turtle.forward() do turtle.dig() end
            search()
            turtle.back()
        end
    elseif direction == 2 then
        local isBlock, block = turtle.inspectUp();
        if isBlock and not isFiller(block) then
            turtle.digUp()
            turtle.up()
            search()
            turtle.down()
        end
    end
end

function search()
    checkBlock(2)
    checkBlock(1)
    turtle.turnLeft()
    checkBlock(1)
    turtle.turnLeft()
    checkBlock(1)
    turtle.turnLeft()
    checkBlock(1)
    turtle.turnLeft()
    checkBlock(0)
end

search()