#!/bin/bash

REFRESHRATE=1
LEDCONTROLLER="/usr/bin/ledcontroller"

iowaitCounter="$(grep 'cpu ' /proc/stat | cut -f 9 -d ' ')"
$LEDCONTROLLER blue
ledcolor="blue"

while (true); do

  iowaitTemp="$(grep 'cpu ' /proc/stat | cut -f 9 -d ' ')"

#  echo "iowaitCounter=$iowaitCounter, iowaitTemp=$iowaitTemp"

  if (( "$iowaitCounter" == "$iowaitTemp" )); then

    if [ "$ledcolor" != "blue" ]; then

      $LEDCONTROLLER blue
      ledcolor="blue"

    fi

  else

     iowaitCounter="$iowaitTemp"

     if [ "$ledcolor" != "red" ]; then

       $LEDCONTROLLER red;
       ledcolor="red"

     fi

  fi

  sleep "$REFRESHRATE";

done