post two images

diff --git a/topics/week13_control_operators.mdwn b/topics/week13_control_operators.mdwn
index a8fd115..1ad9dd0 100644 (file)
--- a/topics/week13_control_operators.mdwn
+++ b/topics/week13_control_operators.mdwn
@@ -1,3 +1,7 @@
+* [Example of an not-fully-immersive game](http://www.i-mockery.com/minimocks/50arcadecabinets/star-wars-arcade.gif)
+* [A more immersive game](http://upload.wikimedia.org/wikipedia/commons/7/78/AC89-0437-20_a.jpeg)
+
+
 3.     `callcc` was originally introduced in Scheme. There it's written `call/cc` and is an abbreviation of `call-with-current-continuation`. Instead of the somewhat bulky form:
 
                (call/cc (lambda (k) ...))