diff --git a/fillit.c b/fillit.c
index 29601f5..2d12a69 100644
--- a/fillit.c
+++ b/fillit.c
@@ -63,3 +63,40 @@ t_map	*map_initialization(char **tetramino_table)
 	clear_map(map);
 	return (map);
 }
+
+void	insert_tetramino(t_map *map, int index)
+{
+	int i;
+	int	k;
+	t_tetraminos *temp;
+
+	temp = map->figure[index];
+	i = temp->offset_y;
+	k = i + 4;
+	while (i < k)
+	{
+		map->line[i] |= temp->line[i];
+		i++;
+	}
+}
+
+
+void	erase_tetramino(t_map *map, int index)
+{
+	int i;
+	int k;
+	t_tetraminos *temp;
+
+	temp = map->figure[index];
+	i = temp->offset_y;
+	k = 0;
+	while (k < 4)
+	{
+		map->line[i + k] ^= temp->line[i + k];
+		k++;
+	}
+}
+
+void	algorithm(t_map *map)
+{
+}