wordColor.js

var colors = ["black", "blue", "brown", "green"];
var doc = document.getElementById("content");
var text = doc.innerHTML.split(" ");

function changeColor() {
  doc.innerHTML = "";

  text.forEach(function(word, i) {
    if (i != text.length) {
        word += "\n";
    }
    
    var colourIndex = (i + 1) % colors.length;
    var node = document.createElement("span");
    node.textContent = word;
    node.style.color = colors[colourIndex];
    doc.appendChild(node);
  });
}

// setInterval(changeColor, 1000);