Hello world
White capitals over black while a single hairline sweeps the frame's midline, its length mapped one-to-one onto the loop's progress.
The words sit in white capitals in the middle of a black frame while a thin rule grows from the left edge along the vertical centre, reaching the far side exactly as the loop ends.
The drawing code is a single line whose right end maps the loop's progression straight onto the canvas width — a progress bar as the whole piece. The lettering is an overlaid caption rather than something the sketch paints; the canvas itself only knows the background and the advancing rule.
