What are the calligraphy works of seven-character quatrains?

1, seven-character quatrains hard pen calligraphy works, as shown in the following figure:

2, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

3, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

4. Hard-pen calligraphy works of seven-character quatrains, as shown in the following figure:

5, seven-character quatrains hard pen calligraphy works, as shown in the figure below:

6, seven-character quatrains hard pen calligraphy works, as shown in the figure below: