weedcookie.github.io/index.html at master · weedcookie/weedcookie.github.io · GitHub

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<html>
    <div class="background" style="position: absolute; z-index:-1; left:0; top:0; ">
            <canvas width="max-width" height="max-height" id="canv" />
        </div>
  <script type="text/javascript">
    // Initialising the canvas
var canvas = document.querySelector('canvas'),
    ctx = canvas.getContext('2d');

// Setting the width and height of the canvas
//canvas.width = window.innerWidth;
//canvas.height = window.innerHeight;

canvas.width = screen.width;
let scrollHeight = Math.max(
  document.body.scrollHeight, document.documentElement.scrollHeight,
  document.body.offsetHeight, document.documentElement.offsetHeight,
  document.body.clientHeight, document.documentElement.clientHeight
);

canvas.height = screen.height;

// Setting up the letters
var letters = 'ABCDEFGHIJKLMNOPQRSTUVXYZABCDEFGHIJKLMNOPQRSTUVXYZ123456789!@#$%^&*()?{}[]';
letters = letters.split('');

// Setting up the columns
var fontSize = 15,
    columns = canvas.width / fontSize;

// Setting up the drops
var drops = [];
for (var i = 0; i < columns; i++) {
  drops[i] = 1;
}

// Setting up the draw function
function draw() {

  ctx.fillStyle = 'rgba(0, 0, 0, .1)';
  ctx.fillRect(0, 0, canvas.width, canvas.height);
  for (var i = 0; i < drops.length; i++) {
    var text = letters[Math.floor(Math.random() * letters.length)];
    ctx.fillStyle = '#0f0';
    ctx.fillText(text, i * fontSize, drops[i] * fontSize);
    drops[i]++;
    if (drops[i] * fontSize > canvas.height && Math.random() > .95) {
      drops[i] = 0;
    }
  }
}

// Loop the animation
setInterval(draw, 60);
  </script>

</html>