empty()
function refuel()
  if (turtle.getFuelLevel() <= 150)
    turtle.select(16)
    fuel = turtle.getFuelLevel()
    fuel_l = (850 - fuel) / 80
    turtle.suckDown(fuel_l)
  end
end
function empty()
  turtle.turnLeft()
  turtle.turnLeft()
  for b = 1, 16 do
    turtle.select(i)
    turtle.drop()
  end
  turtle.turnLeft()
  turtle.turnLeft()
end
function farm()
  nbLig = 9
  nbCol = 9
  b = 0
  for i = 1, nbLig do
    for j = 1, nbCol do
      inspect()
    end
    b = b + 1
    if (b%2 ~= 0) then
      turtle.turnLeft()
      inspect()
      turtle.turnLeft()
    else
      turtle.turnRight()
      inspect()
      turtle.turnRight()
    end
  end
  sleep(1)
  maison()
  empty()
end
function maison()
  print("Retours Maison")
  for l = 1, 2 do
    for k = 1, nbLig do
      turtle.forward()
    end
    turtle.turnLeft()
  end
  turtle.back()
end
function inspect()
  local success, data = turtle.inspectDown()
  if data.metadata == 7 then
    turtle.digDown()
  end
  turtle.placeDown()
  turtle.forward()
end

while true do
  refuel()
  farm()
  sleep(60)
end