$MATIC Market Cap: $4,508,150,871
Circulation: 5,188,388,130
Price: $0.8726

document.getElementById("login_button").onclick = login;
document.getElementById("heads_button").onclick = function(){flip("heads")};
document.getElementById("tails_button").onclick = function(){flip("tails")};
    <div class="container">
        <button id="login_button">Sign in with MetaMask</button>

    <div id="game" style="display: none;">
        <input type="number" id="amount">
        <button id="heads_button">Play Heads</button>
        <button id="tailss_button">Play Tails</button>
    </div>

    </div>