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Two new skies.
--3d takes the flock off the plane and into the air: a murmuration of two thousand over its roost, seen from a camera that goes once round it every two minutes. A nearer bird is bigger and brighter, each one heeds its seven nearest neighbours, as starlings do, and the slow air over the roost folds the flock into sheets and ribbons. Hawks hunt it through the air, the pointer is a stick poked into the sky, and the birds wear ink, the new ramp from your terminal's text colour to its background.
--link makes one sky of several terminals. Start cbirds --link in two windows side by side and the birds that fly out of one fly in through the edge of the next, at the same height and in the same direction, hawks included. The windows join left to right in the order they were started, a window that closes leaves the row, and no bird is lost between two windows.
brew install clainstone/tap/cbirds
or, on Debian 12, Ubuntu 22.04 and later, from the apt repository. The .deb files are attached below. Everything else is in the README.