<!doctype html>
<html>
<body>
    <foo id="b">
        <foo id="c">
            <e>
                <padding>
                    <b>
                        <d>
                            <e>
                                <padding>
                                    <aBlock>
                                        <c>
                                            <foo id="f">
                                                <padding>
                                                    <target style="color: white; background-color: green;">White text on green background.</target>
                                                </padding>
                                            </foo>
                                        </c>
                                    </aBlock>
                                </padding>
                            </e>
                        </d>
                    </b>
                <padding>
            </e>
        </foo>
    </foo>

    <foo id="b">
        <d>
            <e>
                <padding>
                    <b>
                        <d>
                            <e>
                                <padding>
                                    <aBlock>
                                        <c>
                                            <foo id="f">
                                                <padding>
                                                    <target style="color: white; background-color: purple;">White text on purple background.</target>
                                                </padding>
                                            </foo>
                                        </c>
                                    </aBlock>
                                </padding>
                            </e>
                        </d>
                    </b>
                <padding>
            </e>
        </d>
    </foo>

    <aBlock>
        <d>
            <e>
                <padding>
                    <b>
                        <d>
                            <e>
                                <padding>
                                    <a>
                                        <c>
                                            <foo id="f">
                                                <padding>
                                                    <target style="color: green; background-color: purple;">Green text on purple background.</target>
                                                </padding>
                                            </foo>
                                        </c>
                                    </a>
                                </padding>
                            </e>
                        </d>
                    </b>
                <padding>
            </e>
        </d>
    </aBlock>
</body>
</html>
