let fireflies = [];

​

function setup() {

  createCanvas(400, 400);

​

  // Create a specified number of fireflies and add them to the array

  for (let i = 0; i < 50; i++) {

    let x = random(width);

    let y = random(height);

    let firefly = new Firefly(x, y);

    fireflies.push(firefly);

  }

}

​

function draw() {

  background(0);

​

  // Define the target position as the mouse pointer

  let target = createVector(mouseX, mouseY);

​

  // Loop through each firefly and update its behavior and display

  for (let firefly of fireflies) {

    firefly.update(target);

    firefly.display();

  }

}

​

// Define the Firefly class

class Firefly {

  constructor(x, y) {

    this.position = createVector(x, y);

    this.velocity = createVector(0, 0);

    this.acceleration = p5.Vector.random2D();

    this.maxSpeed = 2;

    this.maxForce = 0.3;

    this.radius = random(2, 4);

    this.phase = random(TWO_PI); // Randomize the phase of flashing

    this.frequency = random(0.1, 0.5); // Randomize the flashing frequency

    this.amplitude = random(5, 20); // Randomize the flashing amplitude

  }

​

  // Apply a force to the firefly

  applyForce(force) {

    this.acceleration.add(force);

  }

​

  // Update the firefly's position and behavior

  update(target) {

    // Simulate the flashing behavior

    this.angle = this.phase + this.amplitude * sin(this.frequency * millis() * 0.001);

​

    // Move away from the mouse when it's within a certain distance

    let desired = p5.Vector.sub(target, this.position);

    let d = desired.mag();

    if (d < 50) {

      desired.setMag(this.maxSpeed);

      desired.mult(-1);

      let steer = p5.Vector.sub(desired, this.velocity);

      steer.limit(this.maxForce);

      this.applyForce(steer);

    }

​

    // Apply acceleration to the velocity

    this.velocity.add(this.acceleration);

    this.velocity.limit(this.maxSpeed);

    this.position.add(this.velocity);

    this.acceleration.mult(0); // Reset acceleration

​

    // Wrap around the canvas edges

    if (this.position.x < 0) this.position.x = width;

    if (this.position.x > width) this.position.x = 0;

    if (this.position.y < 0) this.position.y = height;

    if (this.position.y > height) this.position.y = 0;

  }

​

  // Display the firefly

  display() {

    noStroke();

    fill(255, 255, 0, 150); // Yellow with transparency

    let x = this.position.x + this.radius * cos(this.angle)*3;

    let y = this.position.y + this.radius * sin(this.angle)*3;

    ellipse(x, y, this.radius * 2);

  }

}

​