Simple Door Program - Wireless Detection

--[[
This is a program I wrote to open/close a door depending on whether or not
a player is near. It isn't that great. I just works. Note: Uses the
openperipheral sensor block

You can give it arguments as follows:
<progname> <sideofsensor> <sideofredstone>

if you don't give it anything it just uses right and left respectively.
]]

args = {...}

local side = {"right","left"}

if args[1] then side[1] = args[1] end
if args[2] then side[2] = args[2] end

m = peripheral.wrap(side[1])

while true do
  players = m.getPlayerNames()
  if players[1] then
    rs.setOutput(side[2],true)
  else
    rs.setOutput(side[2],false)
  end
  for a,b in pairs(players) do
    term.write(math.floor(a))
    term.write(":")
    print(b)
  end
  sleep(2)
end