Welcome to the CHICKEN Scheme pasting service

(use srfi-18 channel)

(define channel (make-channel))

(define writer
  (thread-start!
   (lambda ()
     (let ((counter 0))
       (let loop ()
	 (set! counter (+ 1 counter))
	 (channel-enqueue channel counter)
	 (thread-sleep! (random 3))
	 (loop))))))

(thread-start!
 (lambda ()
   (let loop ()
     (print "Got " (channel-receive channel 0))
     (thread-sleep! 1)
     (loop))))

(thread-join! writer)