The Macintosh PowerBook BLIT was definitely safe for looking at all possible images.

For a little while, anyway.

@NanoRaptor is that a new pattern? doesn't look like a berryman-langford to me
@alterae @NanoRaptor It's an older creepypasta image inspired by BLIT: https://creepypasta.fandom.com/wiki/The_Parrot
The Parrot

The image on the right, (colloquially "The Parrot," as it bears the resemblance even when viewed safely) is a reconstruction of Berriman and Turner's original "Logical Imaging Technique" image produced by Cambridge Computing Lab IV (now, obviously, defunct) at some point in 1983. This image, along with several others inadvertently produced - most infamously 'Langford's Basilisk' and the imagery produced by a typographical error in Your Sinclair #23's "Fun with Fractals" feature. - generates...

Creepypasta Wiki
@Mayabotics @NanoRaptor that looks more like a chicken than a parrot but thank you!