#!/bin/bash
LAMPE=`echo $1 | sed -n '/^[1-2]*[0-9]*[0-9]$/p' | xargs echo "obase=16;" | bc` 
TOGGLE=`echo $2 | sed -n '/^[0-1]$/p'` 
if ! [ "$LAMPE" -a "$TOGGLE" ];then
  echo "you are made of stupid"
  exit 1
fi
STRING="\xA5\x5A\x$LAMPE\x$TOGGLE"
if [ $# != 2 ]
then
    echo -ne "Usage: licht <lampe> <0/1>"
else
    echo "$LAMPE$TOGGLE" 
    echo -ne "$STRING" | nc -u -w1 licht.shack 1337
fi