canvas = {
const ct = DOM.context2d(WIDTH, HEIGHT);
ct.canvas.ct = ct;
const s = ct.canvas.style;
s.margin = `0 ${(width - WIDTH) / 2}px`;
s.backgroundColor = "black";
ct.setTransform(0,1,1,0, WIDTH, HEIGHT);
ct.strokeStyle = "white";
ct.lineWidth = 2;
return ct.canvas;
}
WIDTH = Math.min(800, width)
HEIGHT = 500
t = {
while (true) {
yield Math.sin(Date.now() / DURATION_MS * Math.PI);
}
}
{
const ct = canvas.ct;
const { PI } = Math;
ct.beginPath();
ct.arc(0,0, 10, 0, PI/2);
ct.stroke();
return this || html`(<i>the drawing function</i>)`;
}
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