startup

while true do
  local _, obj = turtle.inspectDown()
  if obj.metadata == 7 then
    turtle.digDown()
    turtle.placeDown()
  end
  local _, obj = turtle.inspect()
  if obj.name == "minecraft:chest" then
    local i = 2
    while i < 17 do
      turtle.select(i)
      turtle.drop()
      i = i + 1
    end
    turtle.select(1)
  end
  local _, block = turtle.inspectUp()
  if block.name == "minecraft:cobblestone" then

        turtle.turnLeft()
  elseif block.name == "minecraft:planks" then
  turtle.turnRight()
  end
  turtle.forward()
end