justgo.lua

tArgs={...}
if tArgs[1] == nil then return end

function processone()
  local success = true
  local downcnt = 0
  while success do
    for x=1,4 do
      turtle.dig()
      turtle.turnRight()
    end
    turtle.digDown()
    success = turtle.down()
    if success then downcnt = downcnt + 1 end
  end
  for x=1,downcnt do
    turtle.up()
  end
end

function processmany(cnt)
  for m=1,tonumber(cnt) do
    print(m)
    processone()
    turtle.forward()
  end
end

processmany(tArgs[1])