Stage Flash Lights

Hello developers =)
I need help finding a tutorial or an example about colorful flash lights that are projected to the stage, before a famous singer comes out. You know, the whole curtain and microphone and the colorful lights that swirl around.
I try this with motion tweens and guides, but can’t get the light to look close to real. Mine look like 50% alpha squares. So I need to see an example how to draw the lights or need a tutorial on this.
I’m heading towards my deadline and help would be really appreciated.