// Constants
int MAX_DISPLACEMENT = 15;
int MAX_ROTATION = 45;
int MARGIN = 30;
 
// Processing Setup
void setup(){  
    smooth();
 
    size(240 + 2*MARGIN,440 + 2*MARGIN);
    background(255);
    noLoop();
    randomSeed(millis());
}
 
// Main drawing function
void draw(){     
    float rand_rot = 0.0;
    int rand_dis = 0;
    int r = 0, g = 0, b = 0;
 
    for (int j=0; j<22; j++){
 
	for (int i=0; i<12; i++){
 
	    // set up rotation and displacement
	    rand_rot = (random(-MAX_ROTATION,MAX_ROTATION))*j/22;
	    rand_dis = floor((random(-MAX_DISPLACEMENT,MAX_DISPLACEMENT))*j/22); 
 	    if ((i == 0 && rand_dis < 0) || (i == 11 && rand_dis > 0)){
		    rand_dis = -rand_dis;
	    }
 
	    // draw rectangle (col=i, row=j)
	    pushMatrix();
	    translate(MARGIN + 20*i + 10 + rand_dis, MARGIN + 20*j + 10 + rand_dis);
	    rotate(rand_rot*PI/180.0);
	    noFill();
            r = floor(random(50,255)*2/(22-j+1));
            g = floor(random(50,255)*2/(22-j+1));
            b = floor(random(50,255)*2/(22-j+1));
            stroke(r,g,b);
	    rect(-10, -10, 20, 20);
	    popMatrix();
 
	}
    }
}