A Pen by Nathan Hakak.

index.html

<br><br><br>

<div id="bigtext">
WARNING, THIS FEATURES FLASHING LIGHTS AND STROBE EFFECTS. YOU HAVE BEEN WARNED.
</div>

script.js

i = 0;
stepSize = 1;
stepStepSize = 1;
iSize = 10;
bigText = document.getElementById("bigtext");

colorIndex = 0;

colors = ["aqua", "black", "blue", "fuchsia", "gray", "green", "lime", "maroon", "navy", "olive", "orange", "purple", "red", "silver", "teal", "white", "yellow"]

function increaseNumber() {
  bigText.innerHTML = i.toString();
  bigText.style.fontSize = iSize.toString() + "pt";
  bigText.style.color = colors[colorIndex];
  document.body.style.backgroundColor = colors[colorIndex + 1];
  
  colorIndex++;
  if (colorIndex == colors.length) {
    colorIndex = 0;
  }
  
  i += stepSize;
  stepSize += stepStepSize;
  iSize++;

}

function run() {
  setInterval(increaseNumber, 10);
}

setTimeout(run, 5000);

style.css

@import url(https://fonts.googleapis.com/css?family=Open+Sans:800);

#bigtext {
	text-align: center;
	font-family: "Open Sans", "sans-serif";
}

wdHqC.markdown

wdHqC

A Pen by Nathan Hakak on CodePen.

License.