round = 1
max = 5

function pickUp()
  for i = 0, 5 do turtle.suck(64) end
  for i = 0, 5 do turtle.suckUp(64) end
  for i = 0, 5 do turtle.suckDown(64) end
end

function moveAndRefuelIfNeeded()
  while not turtle.forward() do
    i = 1
    while not turtle.refuel() do
      turtle.select(i)
      i = i + 1
    end
  end
end

while round < max do
    for rot = 0, 3 do
        success, data = turtle.detectUp()
        if success then
          turtle.digUp()
          pickUp()
        end

        success, data = turtle.detectDown()
        if success then
          turtle.digDown()
          pickUp()
        end

        success, data = turtle.detect()
        if success then
          turtle.dig()
          pickUp()
        end

      for i = 0, round do
        moveAndRefuelIfNeeded()
      end

      turtle.turnLeft()
    end

    print("Round", round, "done")
    round = round + 1
end

print("Done!")