{
const banner = d3.create("svg")
.attr("width", width)
.attr("height", height)
.style("background-color", "black")
;
style(banner);
const defs = banner.append("defs");
title({defs, title: "Advent of Code – 2021", id: "advent-of-code", fill});
square({defs});
filter({defs, id: "glow", flood, radius, blur, opacity});
glow({sketch: banner, id: "advent-of-code", filter: "glow" });
glow({sketch: banner, id: "square", filter: "glow" });
return banner.node();
}