Make tikz image span paper width

Question

I would like a tikz picture to move over to the left so it is touching the edge of the page.

Here is my code:

\begin{figure}
    \resizebox{\paperwidth}{!}{
        \begin{tikzpicture}
            \fill[black!50!blue] (-10, 1) rectangle (10, 2);
            \fill[black!50!blue] (-5, 0) rectangle (5, 3);
        \end{tikzpicture}
    }
\end{figure}

This is what it looks like at the moment. How would I move it over?