/*
 * @name Variables
 * @arialabel Black background with three sets of grey lines that form rectangles.
 * @description Variables are used for storing values. In this example, change
 * the values of variables to affect the composition.
 */
function setup() {
  // createCanvas(720, 400);
  createCanvas(windowWidth, windowHeight);
  background(0);
  stroke(153);
  strokeWeight(4);
  strokeCap(SQUARE);

  let a = 50;
  let b = 120;
  let c = 180;

  line(a, b, a + c, b);
  line(a, b + 10, a + c, b + 10);
  line(a, b + 20, a + c, b + 20);
  line(a, b + 30, a + c, b + 30);

  a = a + c;
  b = height - b;

  line(a, b, a + c, b);
  line(a, b + 10, a + c, b + 10);
  line(a, b + 20, a + c, b + 20);
  line(a, b + 30, a + c, b + 30);

  a = a + c;
  b = height - b;

  line(a, b, a + c, b);
  line(a, b + 10, a + c, b + 10);
  line(a, b + 20, a + c, b + 20);
  line(a, b + 30, a + c, b + 30);
}