Talking to a serial OLED via Arduino. n00b here.

Hi,
Experienced with programming but new to Arduino/electronics here.

I have a 5 pin Serial OLED connected to my Mega. This is the screen http://www.4dsystems.com.au/prod.php?id=181

My setup looks like this for now: Imgur: The magic of the Internet

For now I have to burn the sample code to see graphics on the screen using this library. GitHub - 4dsystems/Goldelox-Serial-Arduino-Library: Arduino Library for 4D Systems Serial Environement for Goldelox

-My question is how to send live data to it via computer? e.g. reading of live weather off web and pushing it to the display. OR Printing an image off an URL to the display. OR I type a string and string is displayed on the display?

Thanks