The material below is Open Game Content from a 3PP Source
School illusion (pattern) [mind-affecting]; Level bard 4, sorcerer/wizard 4
Casting Time 1 standard action
Components V (bard only), S, M (a piece of phosphor), F (a crystal prism); see text
Range medium (100 ft. + 10 ft./level)
Effect colorful lights with a 20-ft.-radius spread
Duration Concentration +1 round/level (D)
Saving Throw Will negates; Spell Resistance yes
A glowing, rainbow-hued pattern of interweaving colors fascinates those within it. Rainbow pattern fascinates a maximum of 24 HD of creatures. Creatures with the fewest HD are affected first. Among creatures with equal HD, those who are closest to the spell’s point of origin are affected first. An affected creature that fails its saves is fascinated by the pattern.
With a simple gesture (a free action), you can make the rainbow pattern move up to 30 feet per round (moving its effective point of origin). All fascinated creatures follow the moving rainbow of light, trying to remain within the effect. Fascinated creatures who are restrained and removed from the pattern still try to follow it. If the pattern leads its subjects into a dangerous area, each fascinated creature gets a second save. If the view of the lights is completely blocked, creatures who can’t see them are no longer affected.
The spell does not affect sightless creatures.