De Computer Graphics and Art vol2 n°3 page 10

 // This sketch is part of the ReCode Project - http://recodeproject.com
 // From Computer Graphics and Art vol2 no3 pg 10
 // by William Kolomyjec
 // "Boxes"
 // 
 // Sermad Buni
 // 2012
 // Creative Commons license CC BY-SA 3.0

function setup() {
 
 var canvaswidth = 17;
 var canvasheight = 17;
 var square_size = 40;
 var randomness = 0.03;
 var iw, jh;
 smooth(8);
 createCanvas( (canvaswidth+2)*square_size, (canvasheight+2)*square_size);
 background(255);
 noFill();
 
 for(var i=0; i < canvaswidth; i++) {
 for(var j=0; j < canvasheight; j++) {
 push();
 translate((square_size*i), (square_size*j));
 if(canvasheight % 2 == 0) {
 iw = canvaswidth/2 - Math.abs(i - canvaswidth/2);
 } else {
 iw = canvaswidth/2 - 0.5 - Math.abs(i - canvaswidth/2 - 0.5);
 }
 
 if(canvasheight % 2 == 0) {
 jh = canvasheight/2 - 0.5 - Math.abs(j - canvasheight/2 + 0.5);
 } else {
 jh = canvasheight/2 - Math.abs(j - canvasheight/2);
 }
 if( jh != 0 || iw != 0) {
 rotate( radians(iw * iw * jh * jh * random(-randomness,randomness)) );
 }
 rect(square_size, square_size, square_size, square_size);
 pop();
 }
 } 
}