alert("Modified by @JonathanRS");
alert("Based on Phenomena/Mostafa code");
alert("If it worked for you, don't forget to like! Thanks :)");
var speed = prompt("Type 1,000 if your PC is fast, 500 for a slow pc")
function Letter() {
var code = "";
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for...