/// <summary>
        /// Bouge le serpent d'1 case
        /// </summary>
        /// <param name="snake">Le serpent à bouger</param>
        /// <param name="newDirection">la direction du serpent</param>
        /// <param name="isWallHit">Le serpent a touché le mur ?</param>
        /// <param name="isFruitEaten">Le serpent a mangé un fruit ?</param>
        /// <param name="gameArea">l'aire de jeu.</param>
        public void MoveSnake(Snake snake, Direction newDirection, bool isFruitEaten, GameArea gameArea)
        {
            snake.AddHeadToBody();
            snake.HeadDirection = newDirection;

            switch (newDirection)
            {
            case Direction.up:
                snake.HeadPosition.y = (snake.HeadPosition.y + gameArea.Height - 1) % gameArea.Height;
                break;

            case Direction.right:
                snake.HeadPosition.x = (snake.HeadPosition.x + 1) % gameArea.Width;
                break;

            case Direction.down:
                snake.HeadPosition.y = (snake.HeadPosition.y + 1) % gameArea.Height;
                break;

            case Direction.left:
                snake.HeadPosition.x = (snake.HeadPosition.x + gameArea.Width - 1) % gameArea.Width;
                break;

            default:
                break;
            }

            if (!isFruitEaten)
            {
                snake.DeleteBodyEnd();
            }
        }