Well I kinda got frustrate not knowing when I had message or missed call,I wouldnt know until I turn on my phone that I had a gmail , so I was looking thru playstore and I found this app for root user called led notify, if you get a message or gmail the three bottom buttons will keep blinking its pretty cool check it out
https://play.google.com/store/apps/details?id=cz.nafik.ledNotifyTrial
https://play.google.com/store/apps/details?id=cz.nafik.ledNotifyTrial