for_function_homework

int rotation;

​

void setup() {

  size(400, 400);

  noStroke();

  smooth();

  //frameRate(0.5);

  //import text type/see texts

    String[] fontList = PFont.list();

    println(fontList);

}

​

void draw() {

​

  background(255);

  circleVortex(width - rotation , height - rotation);

  circleVortex(0, height + rotation);

  circleVortex(width - rotation, 0);

  circleVortex(0, 0 - rotation);

  circleVortex (width - rotation, height + rotation);

  noStroke();

  fill(0 + rotation, 50, 100);

  rect(width - rotation - 15, height - rotation - 15, 30, 30);

  rotation += 1;

}

​

void circleVortex(int x, int y) {

​

  for (int i = 0; i < 600; i += 5) {

    stroke(100, 100, i + 1);

    noFill();

    ellipse(x, y, i, i);

 // for (int j = 0; j < 400; j += 40) {

   // noStroke();

   // fill(255 - j, 100, 255 - j);

   // rect(j+1, 0, j, j);

​

     }

​

}

​

​

​

​