Every 5 ~ 30 seconds, randomly, shows an JEQUITI image fullscreen covering the web page, for a few seconds, then hides and deletes it

jequiti-blinker.js

const commonStyles = "display: block; position: fixed; z-index: 9999999; transition: opacity 100ms ease; left 100ms ease; top: 100ms ease; right: 100ms ease; bottom: 100ms ease; width: 100ms ease; height: 100ms ease;"
const jequitiSettings = {
    min: 5000,
    max: 30000,
    duration: 500,
    waitLoad: 1000,
    waitRemove: 200,
    tid: null,
    src: "https://fraguru.com/mdimg/dizajneri/o.1954.jpg",
    id: "jequiti-overlay",
    styleShow: commonStyles + " opacity: 1;    top:  0px; right:  0px; bottom:  0px; left:  0px;   width: calc(100vw - 100px); height: calc(100vh - 50px);",
    styleHide: commonStyles + " opacity: 0;    top: 50vw; right: 50vw; bottom: 50vw; left: 50vw;   width: 0px;                 height: 0px;"
}
window["Jequiti"] = jequitiSettings

function getJQTi() {
    const config = window["Jequiti"];
    if (!config) return jequitiSettings;
    return window["Jequiti"];
}
function setJQTi(prop, val) {
    let config = window["Jequiti"];
    if (!config) config = jequitiSettings;
    config[prop] = val
}

function blinkJequiti() {
    console.debug('Jequiti :: BEGIN BLINK');

    const prevJequitiImg = document.getElementById(getJQTi().id);
    if (prevJequitiImg) {
        console.debug('Jequiti :: REMOVE PREV');
        prevJequitiImg.remove();
    }

    const jequimg = document.createElement('img');
    jequimg.setAttribute('id', getJQTi().id);
    jequimg.setAttribute('src', getJQTi().src);
    jequimg.setAttribute('style', getJQTi().styleHide);
    document.body.prepend(jequimg);
    console.debug('Jequiti :: CREATED');

    setTimeout(() => {
        jequimg.setAttribute('style', getJQTi().styleShow);
        console.debug('Jequiti :: SHOW STYLES APPLIED');
    }, getJQTi().waitLoad);

    setTimeout(() => {
        jequimg.setAttribute('style', getJQTi().styleHide);
        console.debug('Jequiti :: HIDE STYLES APPLIED');
    }, getJQTi().waitLoad + getJQTi().duration);
    
    setTimeout(() => {
        jequimg.remove()
    }, getJQTi().waitLoad + getJQTi().duration + getJQTi().waitRemove);
}

function prepareNextJequitiBlink() {
    console.debug('Jequiti :: PREPARING NEXT BLINK');

    if (getJQTi().tid) {
        console.debug('Jequiti :: CLEAR TIMEOUT');
        clearTimeout(getJQTi().tid);
        setJQTi("tid", null)
    }
    
    const nextBlinkSecs = Math.floor(Math.random() * (getJQTi().max - getJQTi().min) + getJQTi().min)
        + getJQTi().waitLoad
        + getJQTi().duration
    ;

    console.debug('Jequiti :: NEXT BLINK IN ' + (nextBlinkSecs / 1000) + ' SECS');

    const tid = setTimeout(() => {
        blinkJequiti();
        prepareNextJequitiBlink();
    }, nextBlinkSecs);
    setJQTi("tid", tid);
}

prepareNextJequitiBlink()

Awesome!
I am using this at https://tuliocalil.com.br/