void setup() {
 size(300, 300);
 ellipseMode(CENTER_DIAMETER);
 rectMode(CENTER_DIAMETER); 
}

float m = 0;

void loop() {
 background(170, 30, 30);
 noStroke();
 
 m+=0.5;
 if (m > 10) m=0;
 
 
 for (int j = 0; j < 6; j++) {
  for (int i = 0; i < 6; i++) {
   form(25+i*50, 25+j*50, mouseX/2*random(1)+50, mouseX/2*random(1)+50, PI/(mouseY/2));
   //form(mouseX+50, mouseY+random(5), 50, 50);
  }
 }
}

void form(float xpos, float ypos, float xsize, float ysize, float rot) {
 //float rot = random(PI/150);
 //push();
 rotate(rot);
 fill(190, 90, 90);
 rect(xpos,ypos, xsize, ysize);
 fill(170, 30, 30);
 rect(xpos-xsize/2,ypos, xsize/2, ysize/2);
 rect(xpos,ypos-ysize/2, xsize/2, ysize/2);
 rect(xpos+xsize/2,ypos, xsize/2, ysize/2);
 rect(xpos,ypos+ysize/2, xsize/2, ysize/2);
 //pop();
}