1. First, put 8 eggs, 5 horizontally and 4 vertically, and arrange them according to the following figure.

2. Then, choose the last egg in the horizontal row, as shown in the figure below.

3. Place the last egg in the red marked position and overlap it, as shown in the figure below.

4. In the last picture, there are five eggs displayed horizontally and vertically, as shown in the figure below.