let sentenceArray = [
"Fun fact about me, I love video games, I have been playing video games since I was 10 years old",
"I want to be a front end developer because creating and the building is a passion of mine",
"You should really look at the projects I built, you can get a good look at my skillsets"
];
const el = document.querySelector(".speech-bubble p");
setInterval(() => {
const random = Math.floor(Math.random() * sentenceArray.length);
el.innerText = sentenceArray[random];
}, 2000);
<!DOCTYPE html>
<html>
<head>
<title>Parcel Sandbox</title>
<meta charset="UTF-8" />
</head>
<body>
<div class = "speech-bubble">
<p>Hi there, as you can see I am Sheldon Aldridge</p>
</div>
</div>
</body>
</html>