local minFuelAmount = 200
while true do
if turtle.getFuelLevel() < minFuelAmount then
  turtle.select(9)
  turtle.refuel()
  turtle.select(1)
end
turtle.forward()
turtle.down()
turtle.select(1)
if turtle.placeDown() then
   print(turtle.getFuelLevel())
else
  break
end
turtle.up()
turtle.select(2)
turtle.placeDown()
end