Blue on Green

//create a field of circles

void setup() {

  size(600, 600);

  noLoop();//don't loop through the draw loop

}

​

void draw() {

  background(20, 200, 40);

  noStroke();

  fill(0, 40, 255);

  for ( int yPos = 0; yPos <= height; yPos += height/10) {

    //draw 10 ellipses up and down

    for (int xPos = 0; xPos <= width; xPos = xPos + 50) {

      //draw ellipses 50 pixels apart left and right

      ellipse(xPos, yPos, 25, 25);

    }

  }

}