<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Brython Snake</title>
</head>
<body>
<button onclick = "a()">555555</button>
<h1 id="time">Итог - <div id="min"></div> </h1>
</body>
<script>
var min = 0;
document.getElementById("min").innerHTML = min;
function a(){
min + 1;
}
</script>
</html>