A method to implement first-class continuation and call/cc (call-with-current-continuation) as found in Scheme is given in the article. The method uses nested "while" loops plainly and does not require the implementation language to be able to call functions recursively. Thus, it will be ported easily even to FORTRAN 77 if just given an automatic memory management of cons cells.<p>The current implementation runs in Emacs Lisp, Common Lisp, Lisps in Dart/TypeScript/Go and the implemented Lisp itself.