ccc 75%);
        background-size: 16px 16px;
        background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    }
</style>
<body>
    <p>Test passes if this flashes yellow for one second, then stays blue forever</p>
    <div class="test"><img src="support/blue.png" alt=""></div>
</body>
