(...) I just tried this by modifying the PS barcode maker Doug Eaton posted. I made one 'bar' and one 'space' as a 256x256 GIF and merged them with gifmerge as directed by Doug's PS (plus all space lead-in/lead-out). I played this back at various (...) (25 years ago, 11-Jan-00, to lugnet.robotics.microscout)
The usual caveats with respect to refresh timing apply to all suggestions about displaying something on a computer screen. Think about watching a picture of a TV set on TV. The image seems to creep and only part of it is displayed at any given time. (...) (25 years ago, 12-Jan-00, to lugnet.robotics.microscout, lugnet.robotics)