stripmine

local tArgs = {...}

function mineInteration()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
end

function moveBack()
  for i = 1, tArgs[1] do
    turtle.back()
  end
end

function nextTunnel()
  turtle.turnRight()
  mineInteration()
  mineInteration()
  mineInteration()
  turtle.turnLeft()
end

if tArgs[1] == nil then tArgs[1] = 1 end
if tArgs[2] == nil then tArgs[2] = 1 end
tunnels = tonumber(tArgs[2])
for i = 1, tArgs[2] do
    print("This is Tunnel " ..tostring(i).. ".")
    for i = 1, tArgs[1] do
      mineInteration()
    end
    moveBack()
    if i < tunnels then nextTunnel() end
end