Potato Bird - OpenProcessing

mySketch
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ArrayList < particle > fire = new ArrayList < particle > ();
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void setup() {
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  size(1000, 750);
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}
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void draw() {
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  background(124 + mouseY / 100, 124 + mouseY / 100, 255 + mouseY / 100);
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  if (mouseY >= height / 2) {
    if (random(round(mouseY/ 25)) >= 10) {
      fire.add(new particle());
    }
  }
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  for (particle flare: fire) {
    flare.render();
  }
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  strokeWeight(30);
  stroke(lerpColor(240, 235, 12, 255, 255, 255, 50));
  fill(240, 235, 12);
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  beginShape();
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  vertex(440, 300 + (mouseY - height / 2) / 2);
  vertex(600, 250 + (mouseY - height / 2) / 2);
  vertex(440, 200 + (mouseY - height / 2) / 2);
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  endShape(CLOSE);
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  strokeWeight(15);
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  line(440, 250 + (mouseY - height / 2) / 2, 600, 250 + (mouseY - height / 2) / 2);
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  stroke(lerpColor(200, 170, 130, 255, 255, 255, 50));
  strokeWeight(30);
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  fill(200, 170, 130);
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  ellipse(250, 250 + (mouseY - height / 2) / 2, 400, 250);
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  strokeWeight(30);
  stroke(lerpColor(200, 170, 130, 255, 255, 255, 50));
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  beginShape();
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  vertex(45, 250 + (mouseY - height / 2) / 2);
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  curveVertex(95, 250 + (mouseY - height / 2) / 2);
  curveVertex(145, 250 + (mouseY * 2 - height) / 2);
  curveVertex(195, 250 + (mouseY - height / 2) / 2);
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  vertex(245, 250 + (mouseY - height / 2) / 2);
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  endShape();
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  ellipse(350, 225 + (mouseY - height / 2) / 2, 10, 10);
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}
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class particle {
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  float xPos, yPos, size;
  float offy;
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  particle() {
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    xPos = 650;
    offy = random(-75, 125);
    size = random(2, 10);
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  }
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  void render() {
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    stroke(231, random(27, 135), 10);
    yPos = mouseY / 2 + offy;
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    ellipse(xPos, yPos, size, 2);
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    xPos -= 20;
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  }
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}