digFloor

function refuel()
  if turtle.getFuelLevel() < 10 then
    turtle.select(1)
    turtle.refuel(1)
  end
end

function deployEnderChest(f)
  turtle.select(2)
  turtle.placeUp()
  local p = peripheral.wrap("top")
  p.setFrequency(f)
end

function collectEnderChest()
  turtle.select(2)
  if turtle.getItemCount(2) > 0 then
    turtle.dropDown()
  end
  turtle.digUp()
end

function empty()
  deployEnderChest(2730)
  for i=4,16 do
    turtle.select(i)
    turtle.dropUp()
  end
  collectEnderChest()
  turtle.select(3)
end

function restockAndesite()
  local count = turtle.getItemCount(3)
  if count < 10 then
    deployEnderChest(273)
    turtle.select(3)
    turtle.suckUp(64 - count)
    collectEnderChest()
  end
end

function turnAround()
  turtle.turnLeft()
  turtle.turnLeft()
end

s, data = turtle.inspect()

while data.name ~= "minecraft:obsidian" do
  while turtle.detect() do
    turtle.dig()
    sleep(1)
  end

  refuel()
  restockAndesite()

  turtle.digDown()
  turtle.select(3)
  turtle.placeDown()
  turtle.forward()

  if turtle.getItemCount(16) > 0 then
    empty()
  end

  s, data = turtle.inspect()
end