caca-fantasma07.js

// Constante referente ao palco
const $palco = document.getElementById('palco');

// https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/Math/random
function getRandomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min)) + min;
}

// Esconde a imagem fantasma1.
function esconda() {
    $fantasma1.style.top = getRandomInt(0, $palco.clientHeight - $fantasma1.clientHeight) + "px";
    $fantasma1.style.left = getRandomInt(0, $palco.clientWidth - $fantasma1.clientWidth) + "px";
    $fantasma1.style.display = "none";
}