let angle = 0;
let w = 24;
let ma;
let maxD;

function setup() {
   createCanvas(400, 400, WEBGL);
   ma = atan(1 / sqrt(2))
   maxD = dist(0, 0, 200, 200);
}

function draw() {
   background(100);
   ortho(-400, 400, 400, -400, 0, 600);

   rotateX(-QUARTER_PI);
   rotateY(ma);

   let offset = 0;
   for (let z = 0; z < height; z += w) {
      for (let x = 0; x < width; x += w) {
         push();
         let d = dist(x, z, width / 2,height / 2);
         let offset = map(d, 0, maxD, -PI, PI);
         let a = angle + offset;
         let h = floor(map(sin(a), -1, 1, 120, 320));
         translate(x - width / 2, 0, z - height / 2);
         normalMaterial();
         box(w - 2, h, w - 2);
         //rect(x - width / 2 + w / 2, 0, w - 2, h);
         pop();
      }
      offset += 0.1;
   }

   angle -= 0.08;
}