
                      \begin{tikzpicture}
                                        
                                        \onslide<1->{
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=blue!50, draw=black] (A) at (0,1){};
                                            \node [rectangle, minimum height=6mm, minimum width=3mm, fill=orange!50, draw=black] (Aemb) at (0,-0.5){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (0,-1){\tiny d};
                                            \draw[->](Aemb)--(A);
                                        }
                                        \onslide<1->{
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=green!50, draw=black] (C) at (0,2.8){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (0,3.3){\tiny e};
                                            
                                            \draw[->](A)--(C);
                                        }
                                        
                                        \onslide<1->{
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=blue!50, draw=black] (A) at (1,1){};
                                            \node [rectangle, minimum height=6mm, minimum width=3mm, fill=orange!50, draw=black] (Aemb) at (1,-0.5){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (1,-1){\tiny e};
                                            \draw[->](Aemb)--(A);
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=green!50, draw=black] (C) at (1,2.8){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (1,3.3){\tiny e};
                                            
                                            \draw[->](A)--(C);
                                        }           
                                        
                                        \onslide<1->{
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=blue!50, draw=black] (A) at (2,1){};
                                            \node [rectangle, minimum height=6mm, minimum width=3mm, fill=orange!50, draw=black] (Aemb) at (2,-0.5){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (2,-1){\tiny e};
                                            \draw[->](Aemb)--(A);
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=green!50, draw=black] (C) at (2,2.8){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (2,3.3){\tiny p};
                                            
                                            \draw[->](A)--(C);
                                        }           
                                        \onslide<1->{
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=blue!50, draw=black] (A) at (3,1){};
                                            \node [rectangle, minimum height=6mm, minimum width=3mm, fill=orange!50, draw=black] (Aemb) at (3,-0.5){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (3,-1){\tiny p};
                                            \draw[->](Aemb)--(A);
                                            \node [rectangle, minimum height=8mm, minimum width=3mm, fill=green!50, draw=black] (C) at (3,2.8){};
                                            \node [rectangle, minimum height=3mm, minimum width=3mm,text width=1cm, align=center] (w1) at (3,3.3){\tiny $\langle$ stop $\rangle$};
                                            
                                            \draw[->](A)--(C);
                                        }           

                                \node at (0.5,1.2) {\footnotesize $W$};
                                \node at (3.2,1.8) {\footnotesize $V$};
                                \node at (3.2,0.2) {\footnotesize $U$};
                                \node at (2.5,1.2) {\footnotesize $W$};
                                \node at (2.2,1.8) {\footnotesize $V$};
                                \node at (2.2,0.2) {\footnotesize $U$};
                                \node at (1.5,1.2) {\footnotesize $W$};
                                \node at (1.2,1.8) {\footnotesize $V$};
                                \node at (1.2,0.2) {\footnotesize $U$};

                                \node at (0.2,1.8) {\footnotesize $V$};
                                \node at (0.2,0.2) {\footnotesize $U$};
                                   \draw[->](0.15,1)--(0.85,1);
                                \draw[->](1.15,1)--(1.85,1);
                                            
                                \draw[->](2.15,1)--(2.85,1);

                                        \end{tikzpicture}