diff --git a/a.out b/a.out
index eb7637b..65a0cac 100755
Binary files a/a.out and b/a.out differ
diff --git a/pretty_printing.cmi b/pretty_printing.cmi
index 3043dfc..5fd8bdc 100644
Binary files a/pretty_printing.cmi and b/pretty_printing.cmi differ
diff --git a/pretty_printing.cmo b/pretty_printing.cmo
index 9cf902d..0714f1d 100644
Binary files a/pretty_printing.cmo and b/pretty_printing.cmo differ
diff --git a/pretty_printing.ml b/pretty_printing.ml
index 4f5bd26..5bd08db 100644
--- a/pretty_printing.ml
+++ b/pretty_printing.ml
@@ -448,39 +448,35 @@ let connect l0 =
             end
     in aux l0 ;;
 
-let even_more_pretty_printing t r ystep =
-    open_graph " 1800x800" ;
-    set_window_title "Trees" ;
+let even_more_pretty_printing t r ystep skip =
 
     let sx = Graphics.size_x () in
     let sy = Graphics.size_y () in
 
-    let graphdata = fill_data t ystep sx sy (3*r/4) in
+    let graphdata = fill_data t ystep sx sy (6*r/10) in
     (* graphdata is a ((int * (int * int)) * (int * int)) list array *)
+    (* <==> ((value, (parent_x, parent_y)), (this_x, this_y)) *)
+    if skip = false then begin
+        set_color (rgb 192 192 192);
+        set_line_width 15 ;
+        for dpth = 1 to (Array.length graphdata -1) do
+            connect graphdata.(dpth-1);
+        done;
 
-    set_color (rgb 192 192 192);
-    set_line_width 15 ;
-    for dpth = 1 to (Array.length graphdata -1) do
-        connect graphdata.(dpth-1);
-    done;
+        set_line_width 5 ;
+        for dpth = 0 to (Array.length graphdata -1) do
+            draw_list graphdata.(dpth) dpth r
+        done;
 
-    set_line_width 5 ;
-    for dpth = 0 to (Array.length graphdata -1) do
-        draw_list graphdata.(dpth) dpth r
-    done;
+        let halt = ref false in 
+        while !halt = false do
+            Unix.sleepf 0.1 ;
+            Unix.sleepf 2.0 ;
+            halt := true;
+        done;
+    end;
+    graphdata ;;
 
-    let halt = ref false in 
-    while !halt = false do
-        Unix.sleepf 0.1 ;
-        Unix.sleepf 2.0 ;
-        halt := true;
-    done;
-
-    close_graph () ;
-    () ;;
-
-(* --------------------------------------| TESTS |-------------------------------------- *)
-Random.self_init ;;
 
 let generate_full_graph d = 
     let rec aux n = match n with
@@ -490,7 +486,99 @@ let generate_full_graph d =
     end 
     in aux d ;;
 
-even_more_pretty_printing (generate_full_graph 3) 40 100 ;
+let rec nth l n = match l with
+    | [] -> failwith "Out of range"
+    | h::t when n = 0 -> h
+    | h::t -> nth t (n-1) ;;
+
+let even_more_fancy_dfs_prefixe t graphdata r tts rfound gfound bfound rmark gmark bmark =
+    let rec aux tr dpth os = 
+        match tr with
+        | Empty -> ()
+        | Leaf _ -> begin
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+        end
+        | Node (_, g, d) -> begin
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+
+            aux g (dpth+1) (2*os);
+            aux g (dpth+1) (2*os + 1);
+        end
+    in aux t 0 0 ;;
+
+
+let even_more_fancy_dfs_infixe t graphdata r tts rfound gfound bfound rmark gmark bmark =
+    let rec aux tr dpth os = 
+        match tr with
+        | Empty -> ()
+        | Leaf _ -> begin
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+        end
+        | Node (_, g, d) -> begin
+            aux g (dpth+1) (2*os);
+
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            aux g (dpth+1) (2*os + 1);
+        end
+    in aux t 0 0 ;;
+
+
+let even_more_fancy_dfs_postfixe t graphdata r tts rfound gfound bfound rmark gmark bmark =
+    let rec aux tr dpth os = 
+        match tr with
+        | Empty -> ()
+        | Leaf _ -> begin
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+        end
+        | Node (_, g, d) -> begin
+            aux g (dpth+1) (2*os);
+            aux g (dpth+1) (2*os + 1);
+
+            let data = nth graphdata.(dpth) os in
+            set_color (rgb rfound gfound bfound);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+            Unix.sleepf tts;
+            set_color (rgb rmark gmark bmark);
+            draw_circle (fst (snd data)) (snd (snd data)) r;
+        end
+    in aux t 0 0 ;;
+
+(* --------------------------------------| TESTS |-------------------------------------- *)
+Random.self_init ;;
+
+open_graph " 1800x800" ;;
+set_window_title "Trees" ;;
+
+let gdata = even_more_pretty_printing (generate_full_graph 4) 40 150 false ;;
+
+even_more_fancy_dfs_prefixe (generate_full_graph 4) gdata 40 0.2 255 255 32 32 32 255 ;;
+
+close_graph () ;;
 
 (* compilation command : ocamlfind ocamlc -linkpkg -package unix -linkpkg -package graphics pretty_printing.ml *)
 print_int 0 ;;