diff --git a/README.md b/README.md
index 426cabf..30ef716 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,41 @@ This repository have two different exercises in erlang:
 *  The probability of making a medication/treatment 2 and staying OK is 62%;
 *  The probability of making a medication/treatment 2 and getting KO is 38%.
 
-![alt text](https://i.postimg.cc/5207cpvs/Captura-de-ecr-2019-04-09-s-13-06-01.png)
+```
+
+-module(engine).
+-compile([export_all]).
+
+% Decision Tree
+%
+%                           +----+
+%                       +---> OK |
+%                       |   +----+
+%                       |
+%            +----------|   +----+
+%            | DO MED 1 +---> KO |
+%            +----------+   +----+              +----+
+%                       |                   +---> OK |
+%                       |   +---------------|   +----+
+%                       +--->   DO MED 2    +
+%                           +---------------|   +----+
+%                                           +---> KO |
+%                                               +----+
+%	Each edge can be calculated from the table
+
+
+doAll() ->
+		T = dec_tree:start(),
+		T ! {create_node, 'DO MED1', 0, none},
+		T ! {create_node, 'MED1 OK', 0.980, 'DO MED1'},
+		T ! {create_node, 'MED1 KO', 0.225, 'DO MED1'},
+		T ! {create_node, 'DO MED2', 0.356, 'DO MED1'},
+		T ! {create_node, 'MED 2 OK', 0.62, 'DO MED2'},
+		T ! {create_node, 'MED 2 KO', 0.38, 'DO MED2'},
+		T ! {solve}.
+
+
+```