Inspector

-- Video of it in action: https://www.youtube.com/watch?v=kTzkTcCTVZg&list=PL9XabkF_A5YhxWelwj2yzjcegL9E0WLw6

while true do
  p1, p2 = turtle.inspect() --gets the data from the block
  if p1 == true then --check if there is a block in front of the turtle
    for k,v in pairs(p2) do --reads the table
      if v == "minecraft:stone" then --checks if the block is stone
        turtle.dig() --makes turtle dig
      end
    end
  end
end