size = 0

turtle.refuel()
print("Refueled turtle!")

function digPlanting()
  turtle.turnLeft()
  turtle.dig()
  turtle.turnRight()
  turtle.turnRight()
  turtle.dig()
  turtle.turnLeft()
end

function back()
  turtle.turnRight()
  turtle.turnRight()
  count = 0
  while count < 16 do
   turtle.forward()
   count = count + 1
  end
end

while size < 16 do
  turtle.forward()
  digPlanting()
  size = size + 1
end

if size == 16 then
  back()
end