diff --git a/README.md b/README.md
index 525a922..fe6ee78 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # cube3D
+---
 
 This project is a 3D mini game, that uses raycasting to produce a FPP (first person perspective), just like in Wolfenstein3D or Doom.
 
@@ -14,11 +15,11 @@ $> cat -e map.cub
 1......................1$
 1......................1$
 1......................1$
-1.......1......1.1.1...1$
+1.....11111....1.1.1...1$
 1.....1...1............1$
-1.......1......1...1...1$
+1.....1...1....1...1...1$
 1.....1...1....E.......1$
-1.......1......1.1.1...1$
+1.....11.11....1.1.1...1$
 1......................1$
 1......................1$
 1......................1$
@@ -49,3 +50,17 @@ And change the map itself :
 
 ![change the map](assets/cube3d_map.gif)
 
+
+# raycasting
+---
+
+
+
+
+# ressources
+---
+
+- [tuto mlx](https://harm-smits.github.io/42docs/libs/minilibx/getting_started.html)
+- [tuto raycasting js](http://www.playfuljs.com/a-first-person-engine-in-265-lines)
+- [course about matrices and transformations in space (chapter 1 to 5)](https://www.youtube.com/watch?v=fNk_zzaMoSs&list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab)
+