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function setup() {
  createCanvas(500, 500); // windowWidth, windowHeight is another Canvas shape mesurement 
  colorMode(RGB);
  background(255, 253, 13, 70);
  //saveFrames('tunnel_', 'jpg', 5, 25);
  frameRate(10);

}

function draw() {
  for (var i = 0; i < 500; i++) {
    var w = random(500 * 100); //random X
    var colors = [color(255, 159, 13),
                  color(255, 253, 13),
                  color(255, 83, 13), 
                  color(232, 44, 12), 
                  color(255, 0, 0), 
                  color(232, 12, 122),
                  color(255, 13, 255)];
    var c = round(random(6));  // select array colors
        smooth(); // smooth
        noFill();
        stroke(colors[c]); //set stroke color
        strokeWeight(0.25 + random (0.5 + 14));
        strokeCap(SQUARE); // Endpoint of the arcs are as a square drawn
        arc( width/2, height/2, w, w,random(50), random(50));
    }
}