Deep.js

window.addEventListener('load', main(), false);

function main() {
    // Main
    let date = new Date();
    let dateString = date.toISOString;
    let txtArray = ["> CALL TRANS OPT: RECEIVED. " + dateString + " REC:LOG>", "> WARNING: CARRIER ANOMALY.", "> TRACE PROGRAM: RUNNING.", "> WAKE UP...", "> THE MATRIX HAS YOU.", "> IT HAS BEEN WATCHING.", "> IT IS TIME FOR YOU TO KNOW THE TRUTH.", "> WILL YOU? (Y / N)"];
    const _SPEED = 100;

    wait(5000);

    let ul = document.createElement("ul");
    let listClass = document.createAttribute("class");
    listClass.value = "dialog-pane";
    ul.setAttributeNode(listClass);

    newChat(txtArray[0], _SPEED, ul);


    // Chat
    function newChat(string, speed, ulist) {
        let li = document.createElement("li");
        let label = document.createElement("label");
        let prompt = document.createTextNode(">");
        label.appendChild(prompt);

        let classAtt = document.createAttribute("class");
        classAtt.value = "message";
        label.setAttributeNode(classAtt);

        li.appendChild(label);

        ulist.appendChild(li);

        typeWriter(string, li, speed);
    }

    // Typewrite
    function typeWriter(str, list, spd) {
        let i = 0;
        if (i < str.length) {
            list.innerHTML += str.charAt(i);
            i++;
            setTimeout(typeWriter, spd);
        }
    }
    // Helper
    function wait(ms) {
        let d = new Date();
        let d2 = null;
        do {
            d2 = new Date();
        } while (d2 - d < ms);
    }
}