The design of a circular flower bed for the National Day celebration typically involves creating an aesthetically pleasing and culturally significant arrangement of flowers. This could include selecting appropriate flower species that represent the country's symbols or colors, arranging them in a circular pattern that is both visually appealing and symbolizes unity. The design might also incorporate traditional elements or motifs that reflect the country's heritage. Factors such as the size of the flower bed, available space, and seasonal availability of flowers would also influence the design process.