beamer blocks disposal in circle

Question

I am happy with my beamer slides and I think blocks are nice to separate ideas...

But I've seen some Cisco presentations (most probably powerpoint) with like an image in the middle and then multiple blocks disposed around it (in a circle shape)

I think the effect is very nice, and I don't know how to do it in beamer: do you have an idea?

The idea is to have this kind of shape:

C1  C2 C3
  \ | /
C4-Im-C5
  / | \
C6 C7  C8

Im is the image and all Cn are comments (and should be nice inside blocks)

Thank you Louis

PS: a perfect solution should allow to place some \pause in the blocks, so that we have first the image, then first comment and so on...

Answer 1

The image can/should be done in TikZ and the overlaying can be done using the \action command (\pause is not quite smart enough here).

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{shapes}

\begin{document}
\begin{frame}
\begin{center}
\begin{tikzpicture}
\action<+->{\node[fill=red,ellipse] (O) {Im};}
\foreach \text/\q in {$C_1$/135,$C_2$/90,$C_3$/45,$C_4$/180,$C_5$/0,$C_6$/225,$C_7$/270,$C_8$/315} {
    \action<+->{\draw (\q:2cm) node[fill=blue!20!white,draw,rectangle]  {\text} -- (O);}
}
\end{tikzpicture}
\end{center}
\end{frame}
\end{document}