What did George Seurat believe about complementary colors, and how did he use them in The Circus?

Seurat believed colors looked stronger when used along with their complementary color. ... But instead of moving the image, he used many dots of pure color. The dots are too small to tell apart from afar. Georges Seurat (1859-1891), The Circus, 1890-91.

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)