Rainbow Pattern

Make a spell card:
NameRainbow Pattern
SchoolIllusion (Pattern)
LevelBeguiler 4, Brd 4, Sor/Wiz 4
ComponentsV, S, M, F, text
Casting Time1 standard action
Recharge TimeGeneral
RangeMedium (100 ft. + 10 ft./level)
EffectColorful lights with a 20-ft.-radius spread
DurationConcentration + 1 round/level (D)
Saving ThrowWill negates
Spell ResistanceYes