How do principles and elements of art help in creating artworks?

These principles are line, shape, color, value, form, texture, and space. The principles of art represent how the artist uses the elements of art to create an effect and to help convey the artist's intent. The principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.