let skulls;

let off;

​

function setup() {

  createCanvas(800,800);

  background(0)

  off = width * 0.01;

  lines = [];

  for (let _ = 0; _ < 1000; _++) {

    let a = random(-TWO_PI, TWO_PI);

    lines.push({

      sx:width/2,

      sy:height/2,

      // ex:width/2+width*cos(a),

      // ey:height/2+height*sin(a),

      col: random(255),

      a: a,

      step: random([-1,1]) * random(64,256),

      off: random(1,10),

    })

  }

  skulls = [];

  textAlign(CENTER,CENTER);

  // saveGif("perspective.gif", 10);

}

​

function draw() {

  // background(220);

  // background(0)

  fill(0);

  noStroke();

  beginShape();

  vertex(off,off);

  vertex(width-off,off);

  vertex(width-off,height-off);

  vertex(off,height-off);

  beginContour();

  vertex(2*off,2*off);

  vertex(2*off,height-2*off);

  vertex(width-2*off, height-2*off);

  vertex(width-2*off, 2*off);

  endContour();

  endShape(CLOSE);

  for (let l of lines) {

    stroke(color(l.col));

    let ex = width/2 + width*cos(l.a);

    let ey = height/2 + height*sin(l.a);

    let col = color(l.col);

    // fill(color(l.col));

    col.setAlpha(map(120);

    fill(col);

    beginShape();

    vertex(l.sx, l.sy);

    vertex(ex, ey);

    vertex(ex+l.off, ey);

    endShape(CLOSE);

    // line(l.sx, l.sy, ex,ey);

    // l.a += PI/l.step;

    l.a += PI/256;

  }

  push();

  translate(width/2,height/2);

  noStroke();

  for (let i = skulls.length-1; i >= 0; i--) {

    let sk = skulls[i];

    let col = color(sk.col);

    col.setAlpha(map(sk.sz, 1, width, 120, 10));//random(20,120));

    fill(col);

    textSize(sk.sz);

    text(sk.g, 0, 0);

    sk.sz += random(5, 20);

    if (sk.sz > width) skulls.splice(i,1);

  }

  pop();

  if (random() > 0.9) {

    skulls.push({

      col: random(255),

      sz: 1,

      g: random(["♥","☠"]),

    });

  }

}