/**
  Provider is a demo element.
  \color #fba
  \symbol Pv
  \symmetries normal
*/
element Provider{
  DebugUtils du;
  EventWindow ew;
  AtomUtils au;
  Random rm;

  Void behave(){
    WindowServices ws;
    ws.reset(1,1);
    Empty e;
    Signal s;
    Int et=au.getType((Atom) e);
    if(ws.scan(et)){ //check if there is empty slot to produce Signal atoms 
      if(rm.oneIn(3)){
        ew[ws.getPick(0)]=s;//pick a random site to send out a Signal
      }
    }
  }
}