Opening Shot. A masked figure kills Yellow.
Yellow: Aaaaaahhhhhhh! [dies]
Enter Purple. Pops up from side of screen.
Purple: I guess she's been "killed"
Opening Credits and things. Music by "The Who".
Purple: I know it was you, Green!
Green: I'm not even real. I'm one of your hallucinations!
Red: She's right, purple. It can't have been either of us, we're figments of your imagination.
Purple: Oh yeah.
Purple Detective Office
Purple: If it wasn't them, then who was it.
Purple: I want money for drugs. Maybe if I kill Yellow, I can take her money.
End of Flashback.
Purple: Cool, I'm a murderer.
The preceding script is likely to win a BAFTA.