diff --git a/p24/p24.org b/p24/p24.org
index 6b785d5..805d061 100644
--- a/p24/p24.org
+++ b/p24/p24.org
@@ -1,50 +1,70 @@
+
 #+title: Solution to p24
 #+begin_src emacs-lisp :results none
-  (require 'dash)
-  (setq zzz (--map (intern (format "z%02d" it)) (-iterate #'1+ 0 100)))
-  (-each zzz #'unintern)
-  (with-temp-buffer
-    (insert-file-contents "input")
-    (goto-char (point-min))
-    (advent/replace-multiple-regex-buffer
-     '(("^\\(.*\\):\\(.*\\)$" . "\\1 \\2")
-       ("^$" . ")\n (defun step ()\n (setq ")
-       ("^\\(.*\\) \\(.*\\) \\(.*\\) -> \\(.*\\)$" .
-        "\\4 (\\2 '\\1 '\\3)")))
-    (insert "(setq ")
-    (goto-char (point-max))
-    (insert "))")
-    (write-file "tmp")
-    (eval-buffer))
-
-  (defun good-vars (a b)
-    (and (boundp a) (eval a)
-         (boundp b) (eval b)))
-
-  (defun XOR (a b)
-    (when (good-vars a b)
-      (logxor (eval a) (eval b))))
-
-  (defun OR (a b)
-    (when (good-vars a b)
-      (logior (eval a) (eval b))))
-
-  (defun AND  (a b)
-    (when (good-vars a b)
-      (logand (eval a) (eval b))))
-#+end_src
+    (require 'dash)
+    (org-babel-lob-ingest "../lib/advent-lib.org")
+    (setq zzz (--map (intern (format "z%02d" it)) (-iterate #'1+ 0 100)))
+    (-each zzz #'unintern)
+    (with-temp-buffer
+      (insert-file-contents "input-test")
+      (goto-char (point-min))
+      (advent/replace-multiple-regex-buffer
+       '(("^\\(.*\\):\\(.*\\)$" . "\\1 \\2")
+         ("^$" . ")\n (defun step ()\n (setq ")
+         ("^\\(.*\\) \\(.*\\) \\(.*\\) -> \\(.*\\)$" .
+          "\\4 (\\2 '\\1 '\\3)")))
+      (insert "(setq ")
+      (goto-char (point-max))
+      (insert "))")
+      (write-file "tmp")
+      (eval-buffer))
+
+    (defun good-vars (a b)
+      (and (boundp a) (eval a)
+           (boundp b) (eval b)))
+
+    (defun XOR (a b)
+      (when (good-vars a b)
+        (logxor (eval a) (eval b))))
+
+    (defun OR (a b)
+      (when (good-vars a b)
+        (logior (eval a) (eval b))))
+
+    (defun AND  (a b)
+      (when (good-vars a b)
+        (logand (eval a) (eval b))))
+ #+end_src
 
 #+begin_src emacs-lisp
-  (step)
+      (step)
+
+      (setq
+       used-xxx (-filter #'boundp  (--map (intern (format "x%02d" it)) (-iterate #'1+ 0 100)))
+       used-yyy (-filter #'boundp  (--map (intern (format "y%02d" it)) (-iterate #'1+ 0 100)))
+       used-zzz (-filter #'boundp  (--map (intern (format "z%02d" it)) (-iterate #'1+ 0 100))))
 
-  (setq used-zzz  (-filter #'boundp  (--map (intern (format "z%02d" it)) (-iterate #'1+ 0 100))))
 
-  (while (not (-every #'eval used-zzz))
-    (step))
+      (defun run ()
+      (while (not (-every #'eval used-zzz))
+        (step)))
 
-  (apply #'+ (--map-indexed (* (eval it) (ash 1 it-index)) used-zzz))
+      (defun reset-var (li)
+        (--each li (setq it nil)))
 
+  (defun set-var (li a)
+   (--each-indexed li (setq it (logand 1 (ash a (* -1 it-index)))))
+    )
+    
+      (defun var-value (li)
+        (apply #'+ (--map-indexed (* (eval it) (ash 1 it-index)) li)))
+    (reset-var used-zzz)
+  (set-var used-xxx 0)
+    (set-var used-yyy 0)
+    (run)
+      (var-value used-zzz)
 #+end_src
 
 #+RESULTS:
-: 36035961805936
+: 2024
+(length used-zzz)