function setup() {

  createCanvas(800, 600);

  background(0);

}

​

// Draw function

function draw() {

  // Background gradient

  for (let y = 0; y < height; y++) {

    let gradient = map(y, 0, height, 0, 1);

    let col = lerpColor(color(0, 0, 40), color(0, 0, 80), gradient);

    stroke(col);

    line(0, y, width, y);

  }

  // Random shapes

  noStroke();

  for (let i = 0; i < 200; i++) {

    let x = random(width);

    let y = random(height);

    let size = random(10, 50);

    let shapeColor = color(random(255), random(255), random(255), 100);

    fill(shapeColor);

    drawShape(x, y, size);

  }

}

​

// Function to draw a random shape

function drawShape(x, y, size) {

  let shapeType = floor(random(3));

  if (shapeType === 0) {

    ellipse(x, y, size, size);

  } else if (shapeType === 1) {

    rect(x, y, size, size);

  } else {

    triangle(x, y, x + size, y, x + size / 2, y - size);

  }

}

​

​

​