#!/bin/bash

orguser0=`sed 's/.*\[\([^]]*\)\].*/\1/' /sys/class/leds/beaglebone:green:usr0/trigger`
orguser1=`sed 's/.*\[\([^]]*\)\].*/\1/' /sys/class/leds/beaglebone:green:usr1/trigger`
orguser2=`sed 's/.*\[\([^]]*\)\].*/\1/' /sys/class/leds/beaglebone:green:usr2/trigger`
orguser3=`sed 's/.*\[\([^]]*\)\].*/\1/' /sys/class/leds/beaglebone:green:usr3/trigger`

echo none | sudo tee /sys/class/leds/beaglebone:green:usr0/trigger >/dev/null
echo none | sudo tee /sys/class/leds/beaglebone:green:usr1/trigger >/dev/null
echo none | sudo tee /sys/class/leds/beaglebone:green:usr2/trigger >/dev/null
echo none | sudo tee /sys/class/leds/beaglebone:green:usr3/trigger >/dev/null

count=0

while [ $count -lt 5 ]
do

        echo 1 | sudo tee /sys/class/leds/beaglebone:green:usr0/brightness >/dev/null
        sleep 0.4
        echo 0 | sudo tee /sys/class/leds/beaglebone:green:usr0/brightness >/dev/null

        echo 1 | sudo tee /sys/class/leds/beaglebone:green:usr1/brightness >/dev/null
        sleep 0.4
        echo 0 | sudo tee /sys/class/leds/beaglebone:green:usr1/brightness >/dev/null

        echo 1 | sudo tee /sys/class/leds/beaglebone:green:usr2/brightness >/dev/null
        sleep 0.4
        echo 0 | sudo tee /sys/class/leds/beaglebone:green:usr2/brightness >/dev/null

        echo 1 | sudo tee /sys/class/leds/beaglebone:green:usr3/brightness >/dev/null
        sleep 0.4
        echo 0 | sudo tee /sys/class/leds/beaglebone:green:usr3/brightness >/dev/null

        count=$((count + 1))
done

echo ${orguser0} | sudo tee /sys/class/leds/beaglebone:green:usr0/trigger >/dev/null
echo ${orguser1} | sudo tee /sys/class/leds/beaglebone:green:usr1/trigger >/dev/null
echo ${orguser2} | sudo tee /sys/class/leds/beaglebone:green:usr2/trigger >/dev/null
echo ${orguser3} | sudo tee /sys/class/leds/beaglebone:green:usr3/trigger >/dev/null