diff --git a/readme.txt b/readme.txt
index 1618f0b..9b94bbf 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,3 +3,7 @@ xsct.sh
---------
A bash script for running `xsct` to set display colour temperature.
+
+ Run this with CRON. For example, near sunset:
+ 0 16 * * * /home/user/shell-scripts/xsct.sh
+