p5js Typewriter - uses the text() function but could easily use createElement() and html().

sketch.js

var data = "This is a sentence!";
var data2 = "This is a second sentence";

function setup() {
  createCanvas(400,400);
    typeWriter(data, 0, 20, 30, 100);
    typeWriter(data2, 0, 20, 50, 500);
}

function draw() {
  
}

function typeWriter(sentence, n, x, y, speed) {
  if (n < (sentence.length)) {
    text(sentence.substring(0, n+1), x, y);
    n++;
    setTimeout(function() {
      typeWriter(sentence, n, x, y, speed)
    }, speed);
  }
}

great thanks! that's useful!!

Veeery cool! And simple!