#!/bin/bash

THRESH1="1.00"
THRESH2="5.00"
THRESH3="20.00"
THRESH4="40.00"
THRESH5="80.00"
REFRESHRATE=1

LEDCONTROLLER="/usr/bin/ledcontroller"


iostat -c "$REFRESHRATE" | while read iostatOutput; do

  iowaitPercent="$(echo "$iostatOutput" | grep -vE "Linux|avg|^$" | awk '{print $4}')"

  [ -z "$iowaitPercent" ] || \
  if (( $(bc <<< "$iowaitPercent > $THRESH1") == 0  )); then 

    $LEDCONTROLLER off

  elif (( $(bc <<< "$iowaitPercent > $THRESH2") == 0 )); then

    $LEDCONTROLLER green

  elif (( $(bc <<< "$iowaitPercent > $THRESH3") == 0 )); then

    $LEDCONTROLLER aqua # blue and green

  elif (( $(bc <<< "$iowaitPercent > $THRESH4") == 0 )); then

    $LEDCONTROLLER blue

  elif (( $(bc <<< "$iowaitPercent > $THRESH5") == 0 )); then

    $LEDCONTROLLER purple # red and blue

  else

    $LEDCONTROLLER red

  fi

done