let showScan = false;  // Controls whether to show the scan or the start page

​

function setup() {

  createCanvas(800, 800);

  background(0);

  noStroke();

​

  // Create a "Ready" button on the start screen

  let button = createButton('Ready to check your ultrasound scan');

  button.position(width / 2 - 100, height / 2);

  button.mousePressed(startScan);

}

​

function draw() {

  if (!showScan) {

    // Show the start screen with instructions

    showStartScreen();

  } else {

    // Show the ultrasound scan when the button is clicked

    showUltrasoundScan();

  }

}

​

// Function to handle the start page

function showStartScreen() {

  background(0);

  fill(255);

  textSize(32);

  textAlign(CENTER);

  text('Welcome!', width / 2, height / 2 - 100);

  textSize(24);

  text('Click the button below to start your ultrasound scan', width / 2, height / 2 - 50);

}

​

// Function to show the ultrasound scan

function showUltrasoundScan() {

  background(0);

​

  // Add multiple layers of subtle noise-based waves

  for (let i = 0; i < height; i += 5) {

    let waveColor = map(i, 0, height, 50, 255);  // Light-to-dark grayscale

    fill(waveColor, 20);  // Soft transparency to simulate smooth transitions

​

    beginShape();

    for (let x = 0; x < width; x += 10) {

      let yOffset = noise(x * 0.02 + noiseOffset, i * 0.02) * 50;

      vertex(x, i + yOffset);  // Create smooth, evolving wave patterns

    }

    endShape();

  }

​

  // Add grainy dots to simulate ultrasound artifacts

  for (let i = 0; i < 500; i++) {

    let x = random(width);

    let y = random(height);

    let grain = random(150, 255);

    fill(grain, 50);

    ellipse(x, y, 2, 2);  // Small grainy dots with slight transparency

  }

​

  // Simulate motion by adjusting noise offset each frame

  noiseOffset += 0.01;

}

​

// Function to start the ultrasound scan when the "Ready" button is clicked

function startScan() {

  showScan = true;

  // Remove the button after the user clicks "Ready"

  this.remove();

}

​