let numBulbs = 5;

​

function setup() {

  createCanvas(800, 600);

  textSize(16);

  fill(255);

  for (let a = 0; a < numBulbs; i++) {

    let x = 100 + i * 100; // Calculate x position

    bulbs.push({ x: x, y: 300, on: false }); // Add bulb with calculated x, fixed y, and off state

  }

  // Create buttons

  let button1 = createButton('Turn All On');

  button1.position(50, 500);

  button1.mousePressed(turnAllOn);

​

  let button2 = createButton('Random Light On');

  button2.position(150, 500);

  button2.mousePressed(turnRandomOn);

​

  let button3 = createButton('One Light On');

  button3.position(300, 500);

  button3.mousePressed(turnOneOn);

  let button4 = createButton('Turn All Off');

  button4.position(450, 500);

  button4.mousePressed(turnAllOff);

}

​

function draw() {

  background(0);

  for (let bulb of bulbs) {

    if (bulb.on) {

      fill(255, 255, 0); // Yellow color for ON

    } else {

      fill(50); // Gray color for OFF

    }

    ellipse(bulb.x, bulb.y, 50, 50);

  }

}

​

function turnAllOn() {

  for (let bulb of bulbs) {

    bulb.on = true;

  }

}

​

function turnRandomOn() {

  let index = floor(random(bulbs.length));

  bulbs[index].on = true;

}

​

function turnOneOn() {

  // Turn off all bulbs first

  for (let bulb of bulbs) {

    bulb.on = false;

  }

  // Then turn on one random bulb

  let index = floor(random(bulbs.length));

  bulbs[index].on = true;

}

​

function turnAllOff() {

  for (let bulb of bulbs) {

    bulb.on = false;

  }

}

​