CSS: Start Animation on hover, then never stop again

I am new to CSS-Animation, so maybe the answer for you is easy. But I couldn't find an answer here yet.

I want an Element to start an animation on hover and then never end. It's for an art project because practically it doesn't make any sense.

What I have got is: A little circle, when on hover it starts getting bigger and bigger. And I want that animation to continue endlessly (or fake it like endlessly with transition: 100000s or sth like that).

Any idea how to manage that?

What I have got is this:

.circle{
  background-color: orange;
  border-radius: 10px;
  width: 20px;
  height: 20px;
  margin-top: 10%;
  margin-left: 50%;
  transition: 1000s;
}

.circle:hover{
  transform: scale(8000);
}

.circle:hover{
  transform: scale(8000);
}

<div class="circle"></div>

Thank you very much already.

Solution

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Document</title>
    <style>
        .circle{
            background-color: orange;
            border-radius: 10px;
            width: 20px;
            height: 20px;
            margin-top: 10%;
            margin-left: 50%;
            transition: 1s;
        }
    </style>
</head>
<body>
    <div class="circle" onmouseover="changeScale(this)"></div>
    <script>
        function changeScale(circle){
            circle.style.transform = 'scale(80)';
        }
    </script>
</body>
</html>