Oi. That's a really good one. I don't know exactly what I want to say, I think there should be some element of spontaneity. But I'd want to say how I'd had a good life and how you should really enjoy your time while you have it.
either "These are my last words" or "As much as I laughed, I don't like orange juice"(inside joke) or "Time is fleeting, but what I had, I'm glad I spent it with those I did"
or "Here they come marchin' down the street, like the desperation murmur of a heartbeat" From Homecoming by Green Day or "Time is fleeting, oh fantasy free me, but you can't see me. No, not at all" from The Time Warp