Genuary 1: Harlequin

var gB, fullRes, windowRes;

var requiredFrames = 360;

​

function setup() {

  windowRes = min(windowWidth, windowHeight);

  createCanvas(windowRes, windowRes);

  imageMode(CENTER);

  gB = createGraphics(fullRes = 1024, fullRes);

  gB.colorMode(HSB, 360);

  gB.blendMode(DIFFERENCE);

  background(100);

  frameRate(60);

}

​

function draw() {

  gB.clear();

  var animationProgress = (frameCount / requiredFrames) % 1;

  gB.resetMatrix();

  gB.noStroke();

  gB.fill(360);

  gB.translate(fullRes * 0.5, fullRes * 0.5);

  for (var i = 0; i < 1; i += 1 / 11) {

    var thisAP = animationProgress + i;

    gB.push();

    gB.translate(fullRes * 0.2 * cos(thisAP * TAU), fullRes * 0.3 * sin(thisAP * TAU));

    gB.ellipse(0, 0, cos(thisAP * TAU) * fullRes * 0.5);

    gB.pop();

  }

  background(360);

  displayBuffer(gB);

}

​

function keyPressed() {

  if (key === "g") {

    saveGif('export', requiredFrames, {delay: 0, units: "frames"});

  }

}

​

function displayBuffer(buffer) {

  image(buffer, windowRes/2, windowRes/2, windowRes, windowRes);

}

​

function windowResized() {

  windowRes = min(windowWidth, windowHeight);

  createCanvas(windowRes, windowRes);

}