I'm no poet, but I made a ketek about a cat that keeps showing up at my house, and since it looks like I'm not alone in cateks I'll share it:
Meow! Mouth open, running, cat stops, then screams, purring. It purrs, screams, then stops; runs, opens mouth: Meow!
And yes, I do mean screams. Whenever the cat wants something, he repeatedly emits a demanding yowl "scream" that lasts upwards of five seconds.