// compile with 164.2ppi
#import "@preview/cetz:0.3.1";

#let fps = 60;
#let frames = 6 * fps;

#set page(paper: "presentation-16-9", fill: rgb("202020"))
#set text(font: "Departure Mono", size: 36pt, fill: rgb("ffffff"))

#let cursor(t, blink_rate: 0.3) = {
  text(if calc.rem(t, blink_rate * 2) < blink_rate { "ω" } else { " " })
}

#let done = false;
#let frame = 0;
#while not done {
  frame += 1

  if frame > frames {
    done = true
  } else {
    let t = frame / fps

    page[#cetz.canvas({
      import cetz.draw: *

      // rect((0 + t * 10, 0), (2 + t * 10, 10), fill: white)
      // rect((30,0), (40,1), fill: white)
      circle((1,1), name: "spinner")
      line(
        (1, 1),
        ..range(0, frame + 1).map(f => (anchor: f * 1deg, name: "spinner")),
        fill: white,
        stroke: 0pt
      )
    })]
  }
}