The caption, label and attr_latex lines will be applied to the named result.

#+CAPTION:    my great picture
#+LABEL:      fig:my_picture
#+ATTR_LaTeX:
#+results: mypicture
[[file:fig/mypicture.pdf]]


This code block may be anywhere in the Org-mode file the result will
always be placed at the named results line above.

#+srcname: mypicture
#+begin_src latex :file fig/mypicture.pdf :packages '(("" "tikz")) :border 1em :fit :results raw
 \begin{tikzpicture}[line width=1pt,text centered, inner sep = 2]
     \draw[fill=red!50] (0,0) rectangle  ++(5,1);
     \draw[fill=yellow!50] (1,1) rectangle  ++(1,0.25);
     \draw[fill=yellow!50] (3,1) rectangle  ++(1,0.25);
     \draw[fill=green!50] (0.75,1) rectangle  ++(1.5,-0.4);
     \draw[fill=green!50] (2.75,1) rectangle  ++(1.5,-0.4);
 \end{scope}
 \end{tikzpicture}
#+end_src