You can use your iPhone/iPad as a message board.
(on YouTube)
http://www.youtube.com/watch?v=jmsZfZgTDGQ
(optional settings)
Message word to display
Scrolling direction (from left to right / from right to left)
Blinking scrolling speed (Max blinking speed 4times/1second: The fastest speed not to give harm to our health)
Text color (2 patterns)
Background color (2 patterns)
"Blinking Message Board" can be used for also emergency.
If you want someone to call the police, "Blinking Message Board" quietly helps you.
When you start this application, the message "CALL THE POLICE!"(11 languages) is displayed immediately and vividly.