JSFiddle - React, Tailwind, and code Playground

HTML

<div id="answer"></div>

CSS

#answer {
    width: 700px;
    height: 50px;
    position: absolute;
    left: 50px;
    top: 50px;
    z-index: 6;
    text-align:center;
}
.letterbox {
    position: relative;
    height: 50px;
    width: 50px;
    border: 3px black solid;
    display: inline-block;
    margin-left: 10px;
    margin-top: 0;
    text-align: center;
    font-size: 16px;
}

JavaScript

var createField = function(word){
    var leng = word.length;
    for (var i=0; i<leng; i++){
        $("#answer").append("<p class='letterbox'></p>")
    }
};


var showLetter = function(letter, i){
    $(".letterbox").eq(i).text(letter);
};
createField("abcde");
showLetter("B",3);