My Sketch

let vec;

let t;

let num;

​

function preload(){

  spotlight = loadImage("https://i.imgur.com/41kA2S5.png");

}

​

function setup() {

  createCanvas(400, 400);

  noLoop();

  noFill();

​

  vec = { x: 1, y: 1 };

  num = 500;

  t = 7;

  strokeWeight(2);

  stroke(150,100)

​

}

​

function draw() {

  background(100,100,200);

​

  let x = 200;

  let y = 200;

​

  for (let i = 0; i < num; i++) {

​

    let next_x = x + vec.x * 10+150*random(-1,1);

    let next_y = y + vec.y * 10+150*random(-1,1);

​

    stroke(200);

    noFill();

    bezier(

      x,

      y,

      x + t * vec.x,

      y + t * vec.y,

      next_x - t * vec.x,

      next_y - t * vec.y,

      next_x,

      next_y

    );

    fill(0)

    circle(x,y,2)

​

    x = next_x;

    y = next_y;

    if(dist(x,y,200,200)>130){

      x = 200;

      y = 200;

    }

  }

  blendMode(OVERLAY);

  // fill(250);

  // circle(200,200,300);

  image(spotlight,0,0);

​

}

​