LED Rainbow board assembled

This is a little eye-candy circuit which continuously cycles an RGB LED through the colours of the rainbow. The speed at which the colours change is adjustable.
The circuit has two options:
1. Switch between the different colours. This makes the effect very noticeable.
2. Have the colours fade into each other. This is a more relaxed effect and one I find very pleasing. The choice is yours.

LED Rainbow: [Link]