"256 1-bit 16x16 dot halftones by dpla - ani.gif"

256 1-bit circular patterns simulating 256 grays = 256 dot halftones (black on white next inverted, making 512 frames). Cf. dpla's hexagonal text characters, made on early 2018, which can take advantage of these kinds of discs, plain like here (somehow filled) or not (e.g. procedurally).
2018-02-12 dpla

P.S.
1. The old or buggy format of this aniGIF (where the delay should be minimal, else you may try another viewer) made me merge this plain text outside the in-file metadata.
2. B.t.w., my recent D33SPM matrix features this natural (accretionary) concentric rotation (in the keyboard mapping of its applicative 'fontstruction'), but as 'superpixels' (i.e. groups of pixels from the experimental splitting [concept of proof] and further diffusion [pixel art] of the original LED elements).
2018-04-03 dpla