prog

function farm()
  for i=1,5 do
--    turtle.digDown("left")
    turtle.placeDown()
    turtle.forward()
  end
end

function left()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
end

function right()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
end

function dump()
  turtle.select(2)
  turtle.dropDown()
  turtle.select(1)
end

function again()
  turtle.turnLeft()
  turtle.forward()
  turtle.forward()
  turtle.turnLeft()
  for i=1,6 do
    turtle.forward()
  end
  turtle.turnLeft()
  turtle.turnLeft()
end

--Main program
turtle.forward()
farm()
right()
farm()
left()
farm()
--dump()
again()