sketch.pde

void pillar (float r, float h) {
  push();
  rotateX(HALF_PI);
  circle(0, 0, r);
  pop();

  push();
  translate(0, h, 0);
  rotateX(HALF_PI);
  circle(0, 0, r);
  pop();

  push();
  translate(0, h / 2, 0);
  int count = 32;
  float w = TWO_PI * r / count;
  for (int i = 0; i < count; i++) {
    push();
    rotateY((float)i / count * TWO_PI);
    translate(r/2, 0, 0);
    rotateY(HALF_PI);
    rect(-w / 2, -h / 2, w, h);
    pop();
  }
  pop();
}

void protrude (float r, float h) {
  float head = r * 1;
  push();
  pillar(r, h);
  translate(0, h, 0);
  sphere(head);
  pop();
}

void coronaVirus (float size) {
  sphere(size);
  
  for (int i =0; i < 24; i++) {
    push();
    rotateY((float) i / 24 * TWO_PI);
    for (int j = 0; j < 48; j++) {
      push();
      boolean isSmall = j % 2 == 1;
      float r = isSmall ? size / 20 : size / 10;
      float h = isSmall ? size / 10 : size / 5;
      rotateZ((float) j / 48 * TWO_PI);      
      translate(0, size, 0);
      protrude(r, h);
      pop();
    }
    pop();
  }
}

void setup () {
  size(400, 400, P3D);
}

void draw () {
  background(42);
  noStroke();
  lights();
  translate(200, 200, 0);
  rotateY((float) frameCount / 100 * TWO_PI);
  coronaVirus(100);  
}

sketch_2.pde

void pillar (float r, float h) {
  push();
  rotateX(HALF_PI);
  circle(0, 0, r);
  pop();

  push();
  translate(0, h, 0);
  rotateX(HALF_PI);
  circle(0, 0, r);
  pop();

  push();
  translate(0, h / 2, 0);
  int count = 16;
  float w = TWO_PI * r / count;
  for (int i = 0; i < count; i++) {
    push();
    rotateY((float)i / count * TWO_PI);
    translate(r/2, 0, 0);
    rotateY(HALF_PI);
    rect(-w / 2, -h / 2, w, h);
    pop();
  }
  pop();
}

void protrude (float r, float h) {
  float head = r * 1;
  push();
  pillar(r, h);
  translate(0, h, 0);
  sphere(head);
  pop();
}

void coronaVirus (float size) {
  sphere(size);
  
  for (int i =0; i < 24; i++) {
    push();
    rotateY((float) i / 24 * TWO_PI);
    for (int j = 0; j < 48; j++) {
      push();
      boolean isSmall = j % 2 == 1;
      float r = isSmall ? size / 20 : size / 10;
      float h = isSmall ? size / 10 : size / 5;
      rotateZ((float) j / 48 * TWO_PI);      
      translate(0, size, 0);
      protrude(r, h);
      pop();
    }
    pop();
  }
}

void setup () {
  size(400, 400, P3D);
}

void draw () {
  background(42);
  noStroke();
  lights();
    
  push();
  translate(
    150, 
    200 + noise(150, 200 + frameCount, 0) * 10, 
    0
  );
  rotateY((float) frameCount / 100 * TWO_PI);
  coronaVirus(100);
  pop();
  
  push();
  translate(
    400, 
    250 + noise(400, 250 + frameCount, -400) * 10, 
    -400
  );
  rotateY((float) frameCount / 100 * TWO_PI);
  coronaVirus(80);
  pop();    
}