drawMathsCounter.java

/**
 * This function draws maths counters
 * Those little things from school used to learn to count
 * It takes 2 parameters (x and y) which define
 * the position of the target that is drawn.
 * x: the distance in pixels from the top left
 * y: the distance in pixels from the top right 
 **/
void drawMathCounter(float x, float y) {
  // CReate a loop that causes about 10 circles to be drawn
  for (int i = 0; i < 100; i = i + 11) {
    if (i%2 == 0) { // this line says "if i is an even number then..." 
      stroke(0, 100);
      fill( 0, 100 );    // fill in white
    } else {        // otherwise
      float r = random(255);
      float g = random(255);
      float b = random(255);
      strokeWeight(4);
      stroke(r,g,b, 100);
      fill(r,g,b, 140 );      // fill in black
    }
    ellipse(random(100) + x, random(100) +y, i, i);
  }
}