trial

local times =tonumber(io.read())

while times > 0 do
  local depth = 0
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()

  while depth > -50 do
    turtle.digDown()
    turtle.down()
    depth = depth - 1
  end

  while depth < 0 do
    turtle.up()
    depth = depth + 1
  end
  times = times - 1
end