diff --git a/sapin_noel.bin b/sapin_noel.bin
index 3da8cfb..8d42b46 100755
Binary files a/sapin_noel.bin and b/sapin_noel.bin differ
diff --git a/sapin_noel.ml b/sapin_noel.ml
index dcaeace..951f1ca 100644
--- a/sapin_noel.ml
+++ b/sapin_noel.ml
@@ -3,18 +3,34 @@ open ShiftReg;;
 
 let _ =
   (* On choisit le mode d'affichage Phys *)
-  setupPhys ();
+  ignore(setupPhys ());
   (* reg : pin_value = p_v, pin_shift = p_s, pin_apply = p_a *)
   (* On crée le register *)
-  let reg = genReg 11 13 15 ~invert:true in
+  let reg = genReg 11 13 15 in
   (* On initialise *)
   let leds = initReg reg ~nb_reg:1 in
   (* On boucle pour afficher les leds unes par unes *)
 
   Printf.printf "début\n%!";
-  findLedNumber reg leds;
-  while true do
-    
+  (* On remplit le tableau avec true *)
+  lightLeds leds;
+  (* Pour montrer la différence entre les deux modes *)
+  (* The pulse mode... *)
+  applyRegPulse reg leds 2.;
+  (* The classic mode... *)
+  applyReg reg leds;
+  Unix.sleep 2;
+  (* Only one led : *)
+  clearLeds leds;
+  leds.(1) <- true;
+  (* Pulse *)
+  applyRegPulse reg leds 2.;
+  (* classic *)
+  applyReg reg leds;
+  Unix.sleep 2;
+  (* And a pretty animation *)
+  for i = 0 to 6 do
+    clearLeds leds;
     for k = 0 to (Array.length leds) - 1 do
       leds.(k) <- true;
       applyReg reg leds;
@@ -23,14 +39,16 @@ let _ =
     done;
     for k = (Array.length leds) - 2 downto 0 do
       leds.(k) <- true;
-      applyReg reg leds;
-      delay 100;
+      applyRegPulse reg leds 0.1;
+      (* applyReg reg leds; *)
+      (* delay 100; *)
       leds.(k) <- false
     done;
     lightLeds leds;
+    (* applyRegPulse reg leds 1.; *)
     applyReg reg leds;
     Unix.sleep 1;
-    clearLeds leds;
-  done
+  done;
+  findLedNumber reg leds;
 
 ;;
diff --git a/shiftReg.ml b/shiftReg.ml
index 2f53c1a..8316254 100644
--- a/shiftReg.ml
+++ b/shiftReg.ml
@@ -6,10 +6,16 @@
 *)
 open WiringPiOcaml
 (** reg : (pin_value = p_v, pin_shift = p_s, pin_apply = p_a). It is
-    used to contain the informations about connections. The invert
-    variable is used in order to revert the mode (false = lighted,
+    used to contain the informations about connections.
+    The invert variable is used in order to revert the mode (false = lighted,
     true = not lighted) **)
-type reg = {p_v : int; p_s : int; p_a : int; invert : bool}
+type reg = {p_v : int; p_s : int; p_a : int; invert : bool;}
+
+
+let genReg ?invert:(invert = false) pin_value pin_shift pin_apply =
+  {p_v = pin_value; p_s = pin_shift; p_a = pin_apply; invert}
+
+let write pin value = digitalWrite pin (if value then 1 else 0)
 
 (** The first thing to do is setupPhys (). This function put in OUTPUT
     mode the outputs and return back a bool array which represent the output of registers (begining with the first LED of the first shift register) **)
@@ -17,44 +23,73 @@ let initReg ?nb_reg:(nb_reg = 1) reg =
   pinMode reg.p_v 1; (* mode output *)
   pinMode reg.p_s 1;
   pinMode reg.p_a 1;
+  write reg.p_v false;
+  write reg.p_s false;
+  write reg.p_a false;
   Array.make (8*nb_reg) false (* return back an array for all pieces *)
 
-let write pin value = digitalWrite pin (if value then 1 else 0)
-
-let genReg ?invert:(invert = false) pin_value pin_shift pin_apply =
-  {p_v = pin_value; p_s = pin_shift; p_a = pin_apply; invert = invert}
-  
-(** This function apply all modifications to the register **)
+(* Functions related to basic action of the register *)
+let shift reg value =
+    write reg.p_s false;
+    write reg.p_v (value <> reg.invert); (* On inverse si besoin *)
+    write reg.p_s true
+let validate reg =
+  write reg.p_a true;
+  write reg.p_a false
+    
+(** This function apply all modifications to the register in the same time **)
 let applyReg reg leds =
   write reg.p_a false;
   for i = (Array.length leds) - 1 downto 0 do
-    write reg.p_s false;
-    write reg.p_v (leds.(i) <> reg.invert); (* On inverse si besoin *)
-    write reg.p_s true;
+    shift reg leds.(i)
   done;
-  write reg.p_a true
-
-
+  validate reg
+    
+let applyRegPulse reg leds ?d_t:(d_t = 3000) time =
+  let t = Unix.gettimeofday () in
+  let first_time = ref true in
+  (* Clear the leds *)
+  write reg.p_a false;
+  for i = (Array.length leds) - 1 downto 0 do
+    shift reg false
+  done;
+  (* It create a one at the very beginning *)
+  shift reg true;
+  while !first_time || Unix.gettimeofday () -. t < time do
+    for i = 0 to (Array.length leds) - 1 do
+      (* We add a zero (we need only one true on the line *)
+      if leds.(i) then begin
+	(* On valide en attendant un petit coup *)
+	validate reg;
+	delayMicroseconds d_t;
+      end;
+      shift reg false;
+    done;
+    first_time := false;
+    shift reg true;
+  done
+    
 (** Don't forget to apply it with applyReg after **)
 let clearLeds leds =
   Array.iteri (fun i x -> (leds.(i) <- false)) leds
 let lightLeds leds =
   Array.iteri (fun i x -> (leds.(i) <- true)) leds
 
-(** This function is usefull to find a LED in a logarithm time **)
-let makeIntervalArray leds a b =
-  Printf.printf "%d;%d" a b;
-  Array.iteri
-    (fun i x -> leds.(i) <- ((a <= i) && (i < b)) )
-    leds
-
-let printArray t =
+let printBoolArray t =
   for k = 0 to Array.length t - 1 do
     Printf.printf "%b;" t.(k)
   done;
   Printf.printf "\n%!\n"
     
+
+(** This function is usefull to find a LED in a logarithm time **)
 let findLedNumber reg ?time_answer:(time_answer = 3) leds0 =
+  let makeIntervalArray leds a b =
+    Printf.printf "%d;%d" a b;
+    Array.iteri
+      (fun i x -> leds.(i) <- ((a <= i) && (i < b)) )
+      leds
+  in
   let n = Array.length leds0 in
   let leds = Array.make n false in
   let i = ref 0 in
@@ -64,7 +99,6 @@ let findLedNumber reg ?time_answer:(time_answer = 3) leds0 =
     let middle = !i + (!j - !i)/2 in
     makeIntervalArray leds !i middle;
     applyReg reg leds;
-    printArray leds;
     Printf.printf "\nLighted ? (1 = Yes, other = no) %!";
     let res = input_line stdin in
     if res = "1" then
@@ -77,7 +111,6 @@ let findLedNumber reg ?time_answer:(time_answer = 3) leds0 =
     Printf.printf "\nI think it's this LED : %d.\n%!" !i;
     clearLeds leds;
     leds.(!i) <- true;
-    printArray leds;
     applyReg reg leds;
     Unix.sleep time_answer
   end