This is just a little quick project I have made it can be used for quite a few things i would imagine :)
How- to assemble:
via: Here's how to assemble the arduino!
After you have put this together after following the steps above download the autoscroll serial
Once you have that open it in the Arduino application and upload it to your board.
Note: if your arduino doesn't seem to be connecting make sure you have the proper port and board selected for example heres mine:
To see your input open the serial monitor under Tools > Serial monitor
In the line that opens type anything you wish then press "send" to then see it displayed:)