diff --git a/octave/octave-crib.org b/octave/octave-crib.org
index 5472354..00f896c 100644
--- a/octave/octave-crib.org
+++ b/octave/octave-crib.org
@@ -20,6 +20,7 @@
 #+html_head: <script type="text/javascript" src="http://www.pirilampo.org/styles/readtheorg/js/readtheorg.js"></script>
 #+html_head: <link rel="stylesheet" type="text/css" href="http://www.pirilampo.org/styles/readtheorg/css/htmlize.css"/>
 #+html_head: <link rel="stylesheet" type="text/css" href="http://www.pirilampo.org/styles/readtheorg/css/readtheorg.css"/>
+#+html_head: <link rel="stylesheet" type="text/css" href="../css/notebook.css" />
 #+html_link_home: ../../../index.html
 #+html_link_up: ../../../index.html
 
@@ -32,6 +33,11 @@
    octave>
    #+end_example
 
+** comments
+   #+begin_example
+   octave> x=2 % everything after the % is ignored
+   #+end_example
+
 ** directory commands from octave prompt
    #+begin_example
    octave> pwd
@@ -60,6 +66,21 @@
    ans = 26
    #+end_example
 
+** for-loops
+   #+begin_example
+   octave> fib=ones(1,11);
+   octave> fib(1)=0;
+   octave> for i=3:11
+   octave>   fib(i)=fib(i-1)+fib(i-2);
+   octave> endfor
+   octave> fib
+   #+end_example
+ 
+   #+begin_example
+   fib =
+      0   1   1   2   3   5   8  13  21  34  55
+   #+end_example
+
 * Provenance
   - ~.org~ source for this page is here: file:octave-crib-src.org
   - git hash: src_sh{git rev-parse HEAD}