polka rainbow

float lineOffset = 0; // helper variable to offset eery second line
float dotSize=40; // size of our dots
float dotSpacing=90; // the spacing of our dots

int fileCounter=0; // a counter for file saving

void setup() {
  colorMode(HSB,100);
  size(1920, 1080); //set screen size
  background(100, 0, 100); // draw background
  noStroke(); // remove outlines
}

void draw() {
}

void keyPressed() {
  // this is being called when u press a button
  if (key=='d') {
    drawDots();
  }
  if (key=='r') {
    // save the content of the screen to a file
    save("dots" + fileCounter + ".png");
    fileCounter++; //fileCounter = fileCounter + 1
    println("Saved!");

    // randomize fill color
    fill(random(255),random(255),random(255));

    // randomize background color
    background(random(255),random(255),random(255));

    // randomize size
    dotSize=random(10,100);

    // randomize spacing
    dotSpacing=random(dotSize + 5, dotSize + 100);
  }
}

void drawDots() {
  background(100,0,100);
  dotSpacing = 45;
  float stretch=random(1,16);
  float colorOffset=random(0,100);
  for (int j=-5; j < 150; j=j+1) { // outer loop for lines
    for (int i=-5; i < 200; i=i+1) { // inner loop for individual circles

      // first we check if the line we are drawing
      // is odd or even
      if (j%2==0) {
        // if even, we offset the entire line
        lineOffset=dotSpacing/2;
      } else {
        lineOffset=0;
      }
      lineOffset=random(200);
      // actually draw the dot

      float dotX=i*dotSpacing+lineOffset;
      float dotY=j*dotSpacing + random(200);
      dotSize = random(30,100);

      float myColor=dotX/width * 100;
      myColor = myColor / stretch;
      myColor = myColor + colorOffset;
      myColor = myColor + random(5);
      myColor = myColor % 100;

      fill(myColor,100-random(10),100, random(50,100));
      ellipse(dotX, dotY, dotSize, dotSize);
    }
  }
}