Storing of Massage in Arduino

Hello everybody
I am new to this forum and new to arduino too. I wont some help in regarding the LED Scrolling display using Bluetooth device. the problem which i am facing is that when the first massage is sent on display it gets erased due to power cut or reset of arduino.
But i wont the last sent massage only where ever I power ON the board it should no go to initial condition of the code .The massage only changes when i sent a new one.
Following i have attached the code

Arduino Code.txt (29 KB)

You can store data permanently in the Arduinos EEPROM memory. However it has a limited number of write cycles (100,000 IIRC) so you would not want to change the data too often.

How often do your messages change?