如何使用组元素在每个页面上设置背景图像

Question

我需要在整页上放置背景图像，并且我有几个组元素，有时一页上有两个组

我在半个页面上只看到一张图片，而在下一页上，组元素开始

我希望你能理解我的问题

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[textwidth=15cm,centering]{geometry}
\usepackage[x11names]{xcolor}
\usepackage{graphicx}
\usepackage{background}

% colorize text
\newcommand*\ColText[1]{\textcolor{Goldenrod3}{#1}}

% a tabular* for each food group
\newenvironment{Group}[1]
{\noindent\begin{tabular*}{\textwidth}{@{}p{0.9\linewidth}@{\extracolsep{\fill}}r@{}}
        {\fontsize{30}{35}\selectfont\ColText{#1}}\\[0.8em]}
    {\end{tabular*}}

% to format each entry
\newcommand*\Entry[2]{%
    \sffamily#1 & #2}

% to format each subentry
\newcommand*\Expl[1]{%
    \hspace*{1em}\footnotesize #1}

\begin{document}

        \backgroundsetup{          
            scale=1,
            angle=0,
            opacity=.4,  
            contents={\includegraphics[width=\paperwidth,height=\paperheight]{exaple-image}}
        }
    \begin{Group}{group1}
        \Entry{entry1}\\

        \Entry{entry2}\\
    \end{Group}
    \vfill
    
    \begin{Group}{group2}
        \Entry{entry1}\\
        \Expl{expl1}\\
        \Entry{entry2}\\
        \Expl{expl2}\\
    \end{Group}

\end{document}