keep the screen off when receiving a txt but have the wheel lights flash

[pablomentabo]

Ok, sorry if this has been asked before but I tried to google it and do a serch on this site but couldn't find anything. I basically want what I put as the title of this thread. I like the wheel lights when I get a txt but I don't want my whole screen to light up everytime. If anyone can let me know how to do this I'd appreciate it. Thanks ahead of time.