$ csi -n CHICKEN (c) 2008-2013, The Chicken Team (c) 2000-2007, Felix L. Winkelmann Version 4.8.0 (stability/4.8.0) (rev c4edbf1) linux-unix-gnu-x86-64 [ 64bit manyargs dload ptables ] compiled 2013-01-10 on aeryn.xorinia.dim (Darwin) #;1> (use srfi-18) ; loading /home/syn/.rbenv/versions/chicken-4.8.0.1/lib/chicken/6/srfi-18.import.so ... ; loading library srfi-18 ... #;2> (thread-start! (lambda () (let loop () (print "hey") (thread-sleep! 1) (loop)))) # #;3> hey hey hey (+ 10 2hey 9hey ) 12 #;4> hey hey