let numBuggers = 5000;

let explosionRadius = 2;

​

function setup() {

  createCanvas(600, 400);

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

    let x = random(width);

    let y = random(height);

    buggers.push(new Bugger(x, y));

  }

}

​

function draw() {

  background(220);

  for (let bugger of buggers) {

    bugger.display();

  }

}

​

function mouseClicked() {

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

    if (dist(mouseX, mouseY, buggers[i].x, buggers[i].y) < explosionRadius) {

      triggerChainReaction(buggers[i]);

      buggers.splice(i, 1);

    }

  }

  if (buggers.length === 0) {

    console.log("Congratulations! You've exterminated all the buggers!");

  }

}

​

function triggerChainReaction(bugger) {

  for (let other of buggers) {

    if (dist(bugger.x, bugger.y, other.x, other.y) < explosionRadius) {

      buggers.splice(buggers.indexOf(other), 1);

      triggerChainReaction(other);

    }

  }

}

​

class Bugger {

  constructor(x, y) {

    this.x = x;

    this.y = y;

    this.diameter = 10;

  }

​

  display() {

    fill(255, 0, 0);

    ellipse(this.x, this.y, this.diameter);

  }

}

​