I doubt it. Most patterns would be thought of as just so much "background noise." A pattern that's different, that's not appearing to be just random or robotically repeating gets more attention. However, you also have to remember that a lot of people in the world would step over a bleeding person to get their cup of coffee or that hard to find gift in the Christmas rush. Others are simply oblivious and assume it would be just another tower marking light, even if they saw it a ground level. Too many people are locked up in their own little world. The SOS or beacon needs to be distinctive and cause folks to pay attention. A simple blinking light ain't gonna cut it.