The quality of an abstract painting can be subjective, but some factors that may make a painting "good" include strong composition, a clear sense of the artist's intention, and skillful execution.
The length of an abstract can vary depending on the requirements of the assignment or the intended audience, but it should be concise and to the point.
The five moves of abstract art refer to various techniques used by abstract artists to create their work, including dripping, pouring, splattering, layering, and scraping.