Illusion of space through vanishing points.
function setup() {
var canvas = createCanvas(500, 500);
canvas.parent('sketch');
colorMode(HSB);
rectMode(CENTER);
background(98);
stroke(15);
line(width / 2, 4 * height / 10, width / 2, 6 * height / 10);
for (var x = 0; x <= width; x += width / 20) {
line(x, 0, width / 2, 4 * height / 10);
line(x, height, width / 2, 6 * height / 10);
}
}