mine.lua

local args = {...}
local dist = args[1]

turtle.select(16)
if turtle.getItemCount(16) == 0 then
    error('Please place target block in slot 16')
end

function searchAround()
    turtle.select(16)
    if turtle.compareDown() then
        turtle.digDown()
        turtle.down()
        searchAround()
        turtle.up()
    elseif turtle.compareUp() then
        turtle.digUp()
        turtle.up()
        searchAround()
        turtle.down()
    end

    turtle.turnLeft()
    if turtle.compare() then
        turtle.dig()
        turtle.forward()
        searchAround()
        turtle.back()
    end

    turtle.turnRight()
    turtle.turnRight()
    if turtle.compare() then
        turtle.dig()
        turtle.forward()
        searchAround()
        turtle.back()
    end
    turtle.turnLeft()
end


for i = 1,dist do
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    searchAround()
    turtle.up()
    searchAround()
    turtle.down()
end