diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..18d2eaf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+build/
+main
diff --git a/Makefile b/Makefile
index dc3bcad..05fb64c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CC      := gcc
 CFLAGS  := -Wall -Wextra -g -fsanitize=address,undefined $(shell sdl2-config --cflags)
 LDFLAGS := $(shell sdl2-config --libs)
-TARGET  := main
+TARGET  := game_of_life
 
 SRC_DIR := src
 BLD_DIR := build
@@ -28,4 +28,7 @@ clean:
 fclean: clean
 	rm -f $(TARGET)
 
+run:
+	./$(TARGET)
+
 re: fclean all
diff --git a/src/game_core.c b/src/game_core.c
new file mode 100644
index 0000000..875f23c
--- /dev/null
+++ b/src/game_core.c
@@ -0,0 +1,81 @@
+#include "game_core.h"
+#include <stdlib.h>
+
+const int directions[8][2] = {{-1, -1}, {-1, 0}, {-1, 1}, {0, -1},
+                              {0, 1},   {1, -1}, {1, 0},  {1, 1}};
+
+const uint32_t colors[2] = {BLACK, WHITE};
+
+Board init_board(size_t width, size_t height, int random) {
+  Board board = {NULL, width, height};
+  board.pixels = malloc(height * sizeof(uint32_t *));
+  for (size_t y = 0; y < height; y++) {
+
+    board.pixels[y] = malloc(width * sizeof(uint32_t));
+    for (size_t x = 0; x < width; x++) {
+      if (random)
+        board.pixels[y][x] = colors[rand() % 2];
+      else
+        board.pixels[y][x] = BLACK;
+    }
+  }
+  return board;
+}
+
+void free_board(Board board) {
+  for (size_t y = 0; y < board.height; y++)
+    free(board.pixels[y]);
+  free(board.pixels);
+}
+
+Board copy_board(Board board) {
+  Board copy = init_board(board.width, board.height, 0);
+  for (size_t x = 0; x < board.width; x++) {
+    for (size_t y = 0; y < board.height; y++) {
+      copy.pixels[y][x] = board.pixels[y][x];
+    }
+  }
+  return copy;
+}
+
+void display_board(Board board) {
+  for (size_t y = 0; y < board.height; y++) {
+    for (size_t x = 0; x < board.width; x++) {
+      printf("%c", board.pixels[y][x] == BLACK ? ' ' : 'X');
+    }
+    puts("");
+  }
+}
+
+int count_adjacent(Board board, size_t x, size_t y) {
+  size_t i;
+  int w, h;
+  uint8_t count = 0;
+  for (i = 0; i < 8; i++) {
+    w = x + directions[i][1];
+    h = y + directions[i][0];
+    if (!((w < 0 || w >= (int)board.width) ||
+          (h < 0 || h >= (int)board.height)))
+      if (board.pixels[h][w] == WHITE)
+        count++;
+  }
+  return count;
+}
+
+Board process_game(Board board) {
+  Board new_board = copy_board(board);
+  size_t x, y;
+  uint8_t count = 0;
+  for (y = 0; y < board.height; y++) {
+    for (x = 0; x < board.width; x++) {
+      count = count_adjacent(board, x, y);
+      if (board.pixels[y][x] == BLACK && count == 3) {
+        new_board.pixels[y][x] = WHITE;
+      } else if (board.pixels[y][x] == WHITE && count != 2 && count != 3) {
+        new_board.pixels[y][x] = BLACK;
+      }
+    }
+  }
+  free_board(board);
+  return new_board;
+}
diff --git a/src/game_core.h b/src/game_core.h
new file mode 100644
index 0000000..5dce605
--- /dev/null
+++ b/src/game_core.h
@@ -0,0 +1,22 @@
+#ifndef GAME_CORE_H
+#define GAME_CORE_H
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define BLACK (0xFF000000)
+#define WHITE (0xFFFFFFFF)
+
+typedef struct {
+  uint32_t **pixels;
+  size_t width;
+  size_t height;
+} Board;
+
+void free_board(Board board);
+Board init_board(size_t width, size_t height, int random);
+int count_adjacent(Board board, size_t x, size_t y);
+Board process_game(Board board);
+void display_board(Board board);
+
+#endif
diff --git a/src/main.c b/src/main.c
index 28f956d..796d046 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,12 +1,16 @@
+#include "game_core.h"
 #include "utils.h"
 #include <SDL2/SDL.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <time.h>
 
-#define SEED (42)
+#define SEED (5)
 #define WIDTH (800)
 #define HEIGHT (600)
+#define SIM_WIDTH (10)
+#define SIM_HEIGHT (10)
 
 t_flags process_args(int argc, char **argv) {
   t_flags output_flags = {0};
@@ -32,8 +36,10 @@ t_flags process_args(int argc, char **argv) {
 
 int main(int argc, char *argv[]) {
   t_flags flags = process_args(argc, argv);
+  srand(time(NULL));
+
   if (flags.graphical) {
-    srand(SEED);
+    Board b = init_board(WIDTH, HEIGHT, 1);
 
     SDL_Init(SDL_INIT_VIDEO);
 
@@ -42,12 +48,9 @@ int main(int argc, char *argv[]) {
 
     SDL_Texture *tex =
         SDL_CreateTexture(ren, SDL_PIXELFORMAT_ARGB8888,
-                          SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
+                          SDL_TEXTUREACCESS_STREAMING, SIM_WIDTH, SIM_HEIGHT);
 
     uint32_t pixels[HEIGHT][WIDTH];
-    for (int y = 0; y < HEIGHT; y++)
-      for (int x = 0; x < WIDTH; x++)
-        pixels[y][x] = 0xFFFFFF00;
     int running = 1;
     SDL_Event e;
     while (running) {
@@ -56,16 +59,34 @@ int main(int argc, char *argv[]) {
           running = 0;
 
       // Envoie la matrice à la texture
-      SDL_UpdateTexture(tex, NULL, pixels, WIDTH * sizeof(uint32_t));
+      uint32_t flat[HEIGHT * WIDTH];
+      for (size_t y = 0; y < HEIGHT; y++)
+        for (size_t x = 0; x < WIDTH; x++)
+          flat[y * WIDTH + x] = b.pixels[y][x];
 
+      SDL_Rect dst = {0, 0, WIDTH, HEIGHT};
+      SDL_UpdateTexture(tex, NULL, flat, SIM_WIDTH * sizeof(uint32_t));
       SDL_RenderClear(ren);
-      SDL_RenderCopy(ren, tex, NULL, NULL);
+      SDL_RenderCopy(ren, tex, NULL, &dst);
       SDL_RenderPresent(ren);
+      b = process_game(b);
+      SDL_Delay(500);
     }
     SDL_DestroyTexture(tex);
     SDL_DestroyRenderer(ren);
     SDL_DestroyWindow(win);
     SDL_Quit();
+    free_board(b);
+
+  } else {
+
+    Board b = init_board(SIM_WIDTH, SIM_HEIGHT, 1);
+    display_board(b);
+    puts("----------");
+    b = process_game(b);
+    display_board(b);
+    free_board(b);
   }
+
   return EXIT_SUCCESS;
 }