float theta = 0;
float delta = 0.05;

void setup() {
  size(400, 400);
  frameRate(30);
  smooth();
}

void draw() {
  background(255);
  
  translate(mouseX, mouseY);
  rotate(theta);
  
  rectMode(CENTER);
  noStroke();
  fill(240, 32, 32);
  rect(0, 0, 90, 90);
  
  fill(240, 128, 128);
  rect(120, 0, 45, 45);
  rect(-120, 0, 45, 45);
  rect(0, -120, 45, 45);
  rect(0, 120, 45, 45);
  
  theta += delta;
    
}