// Polls the server state until it's our turn.
async function poll() {
    // Keep polling the server while the game state could change remotely.
    while (game.state.progress == "playing" && !game.yourturn) {
        await sleep(1000);
        response = await fetch('/game');
        await updateGame(response)
    }
}

// Returns a promise that waits ms milliseconds.
function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}