diff --git a/sources_snake/Gene_Snake.vhd b/sources_snake/Gene_Snake.vhd
new file mode 100644
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+++ b/sources_snake/Gene_Snake.vhd
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+----------------------------------------------------------------------------------
+-- Company: 
+-- Engineer: 
+-- 
+-- Create Date: 30.11.2021 10:35:30
+-- Design Name: 
+-- Module Name: Gene_Snake - Behavioral
+-- Project Name: 
+-- Target Devices: 
+-- Tool Versions: 
+-- Description: 
+-- 
+-- Dependencies: 
+-- 
+-- Revision:
+-- Revision 0.01 - File Created
+-- Additional Comments:
+-- 
+----------------------------------------------------------------------------------
+-- a faire:
+--  - faire bouger le snake
+--  - ajouter une clk
+
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+-- Uncomment the following library declaration if using
+-- arithmetic functions with Signed or Unsigned values
+use IEEE.NUMERIC_STD.ALL;
+
+library ourTypes;
+use ourTypes.types.all;
+
+-- Uncomment the following library declaration if instantiating
+-- any Xilinx leaf cells in this code.
+--library UNISIM;
+--use UNISIM.VComponents.all;
+
+entity Gene_Snake is
+Port ( X : in unsigned (9 downto 0);
+       Y : in unsigned (8 downto 0);
+       clk_rapide: in std_logic;
+       clk_lente : in std_logic;
+       reset: in std_logic;
+       snakePresent : out std_logic);
+end Gene_Snake;
+
+architecture Behavioral of Gene_Snake is
+
+component updateSnake
+Port ( inSnake : in pos;
+       outSnake : out pos;
+       inIndex : in unsigned(10 downto 0);
+       outIndex : out unsigned(10 downto 0));
+end component updateSnake;
+
+-- D???claration des signaux
+signal mat: coord;
+signal snake: listSnake;
+signal snakeHere: std_logic;
+signal update: std_logic;
+signal current_index: unsigned(10 downto 0);
+signal updatedIndex: unsigned(10 downto 0);
+signal currentSnake: pos;
+signal updatedSnake: pos;
+begin
+
+U0 : updateSnake
+port map(
+    inSnake => currentSnake,
+    outSnake => updatedSnake,
+    inIndex => current_index,
+    outIndex => updatedIndex
+);
+
+-- Process d'initialisation
+process(mat,snake,reset,clk_rapide,current_index,clk_lente)
+variable current_dir : direction;
+begin
+    if(reset='0')
+    then
+        update <= '0';
+        current_index <= to_unsigned(0,11);
+        for x in 0 to 39 loop
+            for y in 0 to 29 loop
+                mat(x,y) <= to_unsigned(snake'length-1,11);
+            end loop;
+        end loop;
+        
+        mat(0,0) <= to_unsigned(0,11);
+        mat(1,0) <= to_unsigned(1,11);
+        
+        snake(0).X <= to_unsigned(8,10);
+        snake(0).Y <= to_unsigned(8,9);
+        snake(0).dir <= droite;
+        snake(0).isDefined <= '1';
+        
+        snake(1).X <= to_unsigned(24,10);
+        snake(1).Y <= to_unsigned(8,9);
+        snake(1).dir <= droite;
+        snake(1).isDefined <= '1';
+        
+        for i in 2 to snake'length-1 loop
+            snake(i).X <= to_unsigned(0,10);
+            snake(i).Y <= to_unsigned(0,9);
+            snake(i).dir <= gauche;
+            snake(i).isDefined <= '0';
+        end loop;
+    elsif(clk_rapide'event and clk_rapide = '1')
+    then
+        snake(to_integer(current_index)) <= updatedSnake;
+        current_index <= updatedIndex;
+    end if;
+    
+    if (to_integer(current_index) = snake'length) then
+        update <= '0';
+        current_index <= to_unsigned(0,11);
+    end if;
+    
+    if(clk_lente'event and clk_lente = '1')
+    then
+        update <= '1';
+    end if;
+    
+end process;
+
+-- Process de calcul d'affichage
+process(X,Y,mat, snake)
+variable ref : unsigned(10 downto 0);
+variable position : pos;
+begin
+    snakeHere <= '0';
+    for dx in -1 to 1 loop
+        for dy in -1 to 1 loop
+            ref := mat(to_integer(X/16)+dx,to_integer(Y/16)+dy);
+            position := snake(to_integer(ref));
+            if(position.isDefined= '1') then
+                if(X>=position.X-8 and X<=position.X+8 and Y>=position.Y-8 and Y<=position.Y+8) then
+                    snakeHere <= '1';
+                end if;
+            end if;
+         end loop;
+     end loop;
+end process;
+
+currentSnake <= snake(to_integer(current_index));
+snakePresent <= snakeHere;
+end Behavioral;