d' to scale the form. The four variables set the positions based on the value of 'd'.
function setup() {
let d = 70;
let p1 = d;
let p2 = p1 + d;
let p3 = p2 + d;
let p4 = p3 + d;
// Sets the screen to be 720 pixels wide and 400 pixels high
createCanvas(720, 400);
background(0);
noSmooth();
translate(140, 0);
// Draw gray box
stroke(153);
line(p3, p3, p2, p3);
line(p2, p3, p2, p2);
line(p2, p2, p3, p2);
line(p3, p2, p3, p3);
// Draw white points
stroke(255);
point(p1, p1);
point(p1, p3);
point(p2, p4);
point(p3, p1);
point(p4, p2);
point(p4, p4);
}