An email came in overnight from Canadian cousins, who go to great lengths, it seems, to commemorate Armistice Day. Good for them. It's easy to forget. Today's picture combines the red and black of my poppy - in verticals, to mark, in addition, the moment of the day that most resembles corduroy, as the clock moves from 11:11:11:11:00:00 to 11:11:11:11:11.11.
It was three years ago that the Guardian offered readers the chance to download an original Keith Tyson History Picture. This is "mine". Each work consists of a unique randomly-generated sequence of vertical stripes in red, black and green - the roulette colours. Every image has its own title, based on the geographical location of the user: hence "Cheltenham" at the bottom left.
Ahead of the offer, Keith wrote that his computer "will generate a sequence of the numbers one to 32 which relates to the roulette wheel. Each number has an assigned colour. If you hit the jackpot, you'll come away with an entirely green work. But the chances of that happening are 1 in 37 x 37 x 37, 49 times." Even I, who am red/green colour-blind, can see this is not a jackpot that I've won. But the consolations are that Caroline remembered it's St Martin's Day, and I've been asked out to lunch by an old friend!