Gigachad calculator V4.0

var loadingScreen = document.createElement("div");
loadingScreen.id = "loadingScreen";
loadingScreen.style.position = "fixed";
loadingScreen.style.top = "0";
loadingScreen.style.left = "0";
loadingScreen.style.width = "100%";
loadingScreen.style.height = "100%";
loadingScreen.style.backgroundColor = "black";
loadingScreen.style.color = "white";
loadingScreen.style.fontFamily = "Arial, sans-serif";
loadingScreen.style.fontSize = "48px";
loadingScreen.style.textAlign = "center";
loadingScreen.style.lineHeight = "100vh";
var loadingText = document.createElement("span");
loadingText.id = "loadingText";
loadingText.innerHTML = "Loading script";
loadingScreen.appendChild(loadingText);
document.body.appendChild(loadingScreen);
var step = 0;
function updateLoading() {
  step++;
  if (step === 1) {
    loadingText.innerHTML = "loaded";
    setTimeout(updateLoading, 500);
  } else if (step === 2) {
    loadingText.innerHTML = "Brug koden på eget ansvar!";
    setTimeout(updateLoading, 2000);
  } else if (step === 3) {
    loadingScreen.style.transition = "opacity 1s";
    loadingScreen.style.opacity = "0";
    setTimeout(function() {
      document.body.removeChild(loadingScreen);
    }, 1000);
  }
}
//////////////////////////////////////////////////////////////////////////////////////
setTimeout(updateLoading, 1000);
function delayCode(code) {
  setTimeout(code, 3700);
}
delayCode(function() {
var button = document.createElement("Button");
button.innerHTML = "Procent af et givent tal (fx. 20% af 100 = 20)";
button.style = "top:60px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
var number = prompt("Skriv tallet du vil tage en procent af:");
var percentage = prompt("Skriv den procentdel, der skal tages af tallet:");
var answer = number * (percentage / 100);
alert(percentage + "% af " + number + " er: " + answer + ".");
};
var button = document.createElement("Button");
button.innerHTML = "Find originale tal efter en stigning";
button.style = "top:120px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
var rise = prompt("Skriv stigningen i procent (uden % tegn):");
var number = prompt("Skriv tallet:");
var original = number / (1 + rise / 100);
alert("Det originale tal er: " + original);
};
var button = document.createElement("Button");
button.innerHTML = "Hvor meget har jeg sparet?";
button.style = "top:180px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
var currentPrice = prompt("Skriv den nuværende pris på varen:");
var offerPercentage = prompt("Skriv hvor stort tilbudet er i procent (uden % tegn):");
var originalPrice = currentPrice / (1 - offerPercentage / 100);
var moneySaved = originalPrice - currentPrice;
alert("Du sparer: " + moneySaved + " på produktet");
};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:240px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:300px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:360px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:420px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:480px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:540px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
button.innerHTML = "Next update soon";
button.style = "top:600px;left:5px;position:absolute;z-index:99999;padding:15px;width:400px;";
document.body.appendChild(button);
button.onclick = function(){
alert("comming soon!")};
var button = document.createElement("Button");
/////////////////////////////////////////////////////////////////////////////////////////////////
var searchField = document.createElement("input");
searchField.type = "text";
searchField.placeholder = "Skriv dit regnestykke her!";
searchField.style.border = "2px solid black";
searchField.style.borderRadius = "10px";
searchField.style.padding = "5px";
var searchButton = document.createElement("button");
searchButton.textContent = "Udregn";
searchButton.onclick = function() {
  var query = searchField.value;
  query = query.replace(/\s/g, "+");
  query = encodeURIComponent(query);
  var googleWindow = window.open("https://www.google.com/search?q=" + query, "Google", "width=800, height=600");
};
searchButton.style.border = "2px solid black";
searchButton.style.borderRadius = "10px";
searchButton.style.padding = "5px";
searchButton.style.marginLeft = "10px";
var searchDiv = document.createElement("div");
searchDiv.style.position = "fixed";
searchDiv.style.top = "70px";
searchDiv.style.right = "675px";
searchDiv.appendChild(searchField);
searchDiv.appendChild(searchButton);
document.body.appendChild(searchDiv);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
var mathField = document.createElement("input");
mathField.type = "text";
mathField.style.border = "2px solid black";
mathField.style.borderRadius = "10px";
mathField.style.padding = "5px";
mathField.placeholder = "Skriv en ligning her";
var mathButton = document.createElement("button");
mathButton.textContent = "Regn";
mathButton.onclick = function() {
  var problem = mathField.value;
  var link = window.open("https://www.symbolab.com/solver/step-by-step/" + problem, "?or=input", "width=800, height=600");
  window.open.href = link;
};
var mathDiv = document.createElement("div");
mathDiv.style.position = "fixed";
mathDiv.style.top = "70px";
mathDiv.style.right = "450px";
mathButton.style.border = "2px solid black";
mathButton.style.borderRadius = "10px";
mathButton.style.padding = "5px";
mathDiv.appendChild(mathField);
mathDiv.appendChild(mathButton);
document.body.appendChild(mathDiv);
});