diff --git a/rover.fnl b/rover.fnl
index 91c7810..c505434 100644
--- a/rover.fnl
+++ b/rover.fnl
@@ -118,4 +118,10 @@
           {:x 2 :y 4 :direction :e}))
 
 
+"if we travel west past x=-180, x becomes positive 180"
+"if we travel east past x=180, x becomes -180"
+"if we travel east/west at a non-zero latitude, we don't move a full unit"
+"if we arrive at the north pole, we are {:y 90 :direction :s}"
+"if we arrive at the north pole and turn 90 degrees left, x = x - 90"
+
 (print "OK")