When we went to Chicago we visited the Museum of Contemporary Art. In the store we saw a really great George Nelson clock. Unfortunately the price tag ($315) was pretty high, so I decided to build my own.

Even though the original design has an interesting color contrast, I wanted to try a more rainbow color scheme. I basically used colors with a 100% Saturation, 100% Brightness, and multiple of 30° for the Hue value. The colors can be found on Wikipedia.

Color Color Name Additive (RGB) Subtractive (CMY) Hue Web Color Wavelength
  Red
Primary
Secondary
#FF0000
625 - 700nm
  Orange
Tertiary
Tertiary
30°
#FF7F00
585 - 620nm
  Yellow
Secondary
Primary
60°
#FFFF00
570 - 585nm
  Chartreuse
Tertiary
Tertiary
90°
#7FFF00
555 - 565nm
  Green
Primary
Secondary
120°
#00FF00
520 - 555nm
  Spring Green
Tertiary
Tertiary
150°
#00FF7F
500 - 505nm
  Cyan, Auqua, Blue-Green
Secondary
Primary
180°
#00FFFF
485 - 495nm
  Azure
Tertiary
Tertiary
210°
#007FFF
470 - 480nm
  Blue
Primary
Secondary
240°
#0000FF
450 – 470nm
  Violet
Tertiary
Tertiary
270°
#7F00FF
400 - 450nm
  Magenta, Fuchsia
Secondary
Primary
300°
#FF00FF
n/a
  Rose
Tertiary
Tertiary
330°
#FF007F
n/a

Check out my RGB List for more colors.

I just used Photoshop to arrange the color in a circle. It helps, but it cannot really give the idea of the design.

I just modeled this quickly in 3D Studio MAX and exported it to VRML 

I bought most parts at Michaels. I just got a , the dials, a 7" disk and 12×1½" balls. The paint is from Delta Ceramcoat (blah for the balls, Light Ivory for the disk, and Satin Varnish for the finish of all parts).