class LoopForever(LoopForever,Print,Chain) extends Program {
  LoopForever lf;
  Print p;
  method continue(Passive accumulator) {
    p = new Print(Passive,Chain);
    p.next = new LoopForever(Passive,LoopForever,Print,Chain);
    goto p.continue(new 1(Passive));
  }
}