This is how default welcome message looks like.

Before

You can change it by editing /etc/banner file on your carambola.

After 

   ..|'''.|     Powered by 8devices.com        '||              '||                       
 .|'     '   ....   ... ..   ....   .. .. ..    || ...    ...    ||   ....
 ||         '' .||   ||' '' '' .||   || || ||   ||'  || .|  '|.  ||  '' .||
 '|.      . .|' ||   ||     .|' ||   || || ||   ||    | ||   ||  ||  .|' ||
  ''|....'  '|..'|' .||.    '|..'|' .|| || ||.  '|...'   '|..|' .||. '|..'|'

Several websites where you can create your own ASCII art: