1 
  2 string previously_Welcomed;
  3 default
  4 {
  5     collision_start(integer total_number)
  6     {
  7          llSetTimerEvent(30);
  8     }
  9     collision(integer numDetected)
 10     {
 11         if(llDetectedName(0) != previously_Welcomed)
 12         {
 13             previously_Welcomed=llDetectedName(0);
 14             llSay(0,"Welcome to Tromso," + llDetectedName(0));
 15         }
 16     }
 17     timer()
 18     {
 19         previously_Welcomed = "";
 20     }
 21 }// END //