I had an access of poetry-writing in 1991, following a change of flat. This one was published in Cambridge University libraries information bulletin 35-36, 1994-1995, p. 10. The carpet tiles in question were in a library. CULIB's online presence doesn't go back that far, but is worth following.
The green of the new carpet-tiles
so lightly matches that on dull
days it appears a windowful
of wan sunlight has smiled this pool
into the room. The edges are
so finely trimmed you're never sure
if they lap at a fixture or
have moved its rising from the floor.