<meta charset="UTF-8">
<input/>
<button>Adivina el numero</button>
<script>
var input = document.querySelector("input");
var button = document.querySelector("button");
var secreta = Math.round(Math.random() * 5)
function verificar (){
if (input.value == secreta){
alert("Acertaste");
} else {
alert("Fallaste")
}
input.focus();
input.value = "";
}
button.onclick = verificar;
input.focus();
</script>
