I need to illustrate a linked list and the addition of one element is there any way I can stop and continue the foreach loop or pause the chain so it doesn't connect elements 5 and 6 for example?

```
\documentclass{article}
\usepackage{pgffor}
\usepackage{tikz}
\usepackage{xfp}
\usepackage{mathtools}
\usetikzlibrary{calc, shapes.multipart,chains,arrows,positioning}

\tikzstyle{strela} = [thick, ->, >=stealth]

\newcommand\x{9}
\newcommand\y{3}
\newcommand\m{5}

\begin{document}

    \begin{tikzpicture}[ar/.style={*->,shorten <=-.28cm},list/.style={rectangle split, rectangle split parts=2, draw, rectangle split horizontal,join=by ar}, start chain=going right]

            \foreach \i in {3,...,\the\numexpr\x}{
                \node[list,on chain] (\the\numexpr\i) {\i};         
            }  
            \node (strela2) [strela, below of= 3,  xshift=-0.5cm, yshift=-0.7cm]{HEAD};
            \draw (strela2) -> (3); 

            \node (strela3) [strela, below of= \the\numexpr\x,  xshift=-0.5cm, yshift=-0.7cm] {TAIL};
            \draw (strela3) -> (\the\numexpr\x);

            \node (obj) [right of= \the\numexpr\x,draw,inner sep=6pt] (D) {};
            \draw (D.north east) -- (D.south west);
            \draw (D.north west) -- (D.south east);

            \draw [*->, shorten <=+.10cm] (\the\numexpr\x.center) -- (D);

            \node (strela5) [strela, below of= D, yshift=-0.72cm] {NULL};
            \draw (strela5) -> (D);

      \node[list,below of= \the\numexpr\m, xshift=+1cm] (A) {\the\numexpr\m+0.5};

    \end{tikzpicture}

    \begin{flushleft}
        \vspace{2cm}        

    \end{flushleft}

    \begin{tikzpicture}[ar/.style={*->,shorten <=-.28cm},list/.style={rectangle split, rectangle split parts=2, draw, rectangle split horizontal,join=by ar}, start chain=going right]

    \foreach \i in {3,...,\the\numexpr\x/2}{
        \node[list,on chain] (\the\numexpr\i) {\i};         
    } 

    \node[list,below of= \the\numexpr\m, xshift=+1cm] (A) {\the\numexpr\m+0.5};

    \draw[*->] let \p1 = (\the\numexpr\m.two), \p2 = (\the\numexpr\m.center) in (\x1,\y2) -- (A);

    \draw[*->] let \p1 = (A.two), \p2 = (A.center) in (\x1,\y2) -- (\the\numexpr\m+1);

    \foreach \k in {\the\numexpr\x/2 + 1,...,\the\numexpr\x}{
    \node[list, on chain] (\the\numexpr\i) {\k};            
}   

    \node (strela2) [strela, below of= 3,  xshift=-0.5cm, yshift=-0.7cm]{HEAD};
    \draw (strela2) -> (3); 

\end{tikzpicture}
\end{document}

```