Flashing display - incoming calls

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http://androidforums.com – Hello everyone, can someone help me how can I make my phone's display flash, if I got an incoming call? I read this in another topic, and it really got me. I wonder if it's really possible to do and how: "4. If I totally lose my phone I can send a "Find my phone" text message and it will text me back with GPS coordinates. You can plug in those coordinates in Google Maps and get the address or location on a the map." (General)