​

function setup() {

  createCanvas(600, 600); // Adjusted width for better visibility

  // Generate the Padovan sequence up to P(12) to match the 12 rows

  for (let i = 0; i < 12; i++) {

    padovan[i] = padovanNumber(i);

  }

  // Shuffle the Padovan sequence

  shuffle(padovan, true);

  noLoop(); // Draw only once

}

​

function draw() {

  background(255);

  //let rectHeight = 40; // Fixed height for each rectangle

  let spacing = 2.9; // Space between rectangles in the same row

  let fixedRowSpacing = 41; // Fixed space between rows

  let totalWidth = 50 * (2 + spacing) - spacing; // Total width of the barcode

  let startX = (width - totalWidth) / 2; // Calculate starting X position to center

​

  for (let i = 0; i < 12; i++) { // 12 rows

    let yPosition = i * fixedRowSpacing + 150; // Calculate Y position for each row

    let rectHeight = random(20,50);

    // Introduce a horizontal shift based on Padovan number

    let rowShift = padovan[i] < 7 ? (i * random(-2, 2)) : 5; // Shift only if Padovan number > 9

    let spacing = random(1.5 , 10);

    for (let j = 0; j < 21; j++) { // 21 rectangles in each row

      // Use the shuffled Padovan number for width

      let rectWidth = padovan[i] < 5 ? (i *random(0.5 , 1.5)) : 2;

​

      fill(0); // Set fill color to black

      // Draw rectangle, applying the row shift

      rect(startX + rowShift + j * (rectWidth + spacing), yPosition - rectHeight, rectWidth, rectHeight); 

    }

  }

}

​

// Function to calculate Padovan number

function padovanNumber(n) {

  if (n === 0 || n === 1 || n === 2) {

    return 1;

  } else {

    return padovanNumber(n - 2) + padovanNumber(n - 3);

  }

}

​

// Function to shuffle an array

function shuffle(array, shuffleInPlace = false) {

  if (!shuffleInPlace) {

    array = array.slice(); // Create a copy if not shuffling in place

  }

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

    const j = Math.floor(Math.random() * (i + 1));

    [array[i], array[j]] = [array[j], array[i]]; // Swap elements

  }

  return array;

}

​