Its free
;p
ok so i have to put 20 letters so

Look at las meninas by diego velasquez. this painting is a masterful example of the use of:

After first arriving in new york, charlie parker took a job as a dishwasher at jimmy's chicken shack, where played the piano nightly. listening to his astonishing harmonic restructuring, virtuoso phrasing, and breakneck tempos every night for three months, charlie parker challenged himself to adopt these qualities into his playing, and he continued to practice tirelessly.

Which principle of design is in primary use in this sculpture?