N: 660-682, O: 683-709 The N and O paintings are each translations of numbers into form and color. The N's are negative and the O's positive; except for O-683, which is zero. Numbers are translated by representing their prime factors by screens of colored dots layered on top of each other. (Each successive layer of dots is rotated with zero as a locus.) For example: 12 (O-695) breaks down to 2 x 2 x 3. The color for 2 is orange and the color for 3 is red-purple. So 12 appears as two layers of orange dots under a layer of red-purple dots. See O-695. The number 5, a prime, is represented by just one layer of dots, blue-green. See O-688. Each prime theoretically has its own color and by combining them could represent any compound number. 1 is shown by white dots on a white field and -1 by black dots on a black field. The colors for the negative primes are opposite. The numbers in the painting are -23 to 26.