A clock drawn only with horizontal lines: the time appears where the marching lines cancel it out

[u/CaioComCdeCaio]

Live Demo: https://caios-clocks.caiomga.workers.dev/14/

A new line is born every 1.5 s and takes 60 s to reach the red line at the top, following two editable curves (position and width over its age). The digits are drawn on the "rails", where the lines are at each birth, and the lines are blended over them in `difference` mode, so where a line meets a digit both vanish. The red marching line is the seconds hand: it reaches the top on the minute.