diff --git a/README.org b/README.org
index 12d61f6..d61b098 100644
--- a/README.org
+++ b/README.org
@@ -5,10 +5,22 @@ A way to find various subgroups of a group…
 
 * install 
 
-To run this programme you’ll need a working version of [[https://racket-lang.org/][Racket]] installed. An installer can be downloaded from https://download.racket-lang.org/
+To run this programme you’ll need a working version of [[https://racket-lang.org/][Racket]] installed (an installer can be downloaded [[https://download.racket-lang.org/][here]])
+
+on macOS
+#+BEGIN_SRC shell
+brew cask install racket
+#+END_SRC
+
+on debian/ubuntu
+#+BEGIN_SRC shell
+sudo apt intall racket
+#+END_SRC
 
 * schedule
 
+[[https://the-public-domain-review.imgix.net/collections/amundsen-s-south-pole-expedition/6504423149_f4ffeb13b8_o.jpg]]
+
 setup…
 #+BEGIN_SRC racket
 (require "group-scheduling.rkt")