Lisp cyclic lists -

We have been given homework indefinitely where I need to use the "cyclic" list (I do not know if the right What is naming for this) In the "cyclical" list, I mean the list, where the previous code of a previous cdr indicates the first one from the same list.

  (Value1. PointerValue2) (Value2. PointerValue3) (Value3. PointerValue1)   
 We have been taught to create such lists in this way:  
  (defun cykl (l) (setf (cdr) (last L))   
 I LISP software ( lispabax ) Does not support such lists. I also tried  clisp  on Debian, but after creating such a list it has crashed.  
 Did you know that it supports (freeware, OS Free)?   
 
 
 All Lisp implementation, which includes support for  clisp .  
 When you say "crash", you probably mean one (or an out-of-memory era), which you should always  print  ('read-up- Print 'try to remember the loop)?) Is a circular structure when  is zero . Setting  t  forces to use this notation:  
  [1] & gt; (DefEfermeter L (list 1 2 3)) L [2] & gt; L (1 2 3) [3] & gt; (Setic * Print-Circle * T) T [4] & gt;