Arrows

\documentclass[tikz,border=5pt]{standalone}
\usetikzlibrary{decorations.markings}
\usepackage{ifthen}
\newcommand{\forloop}[5][1]%
{%
\setcounter{#2}{#3}%
\ifthenelse{#4}%
        {%
        #5%
        \addtocounter{#2}{#1}%
        \forloop[#1]{#2}{\value{#2}}{#4}{#5}%
        }%
% Else
        {%
        }%
}%
\newcounter{ct}
\setcounter{ct}{1}

\newcommand{\arrowN}[1]{%
\forloop{ct}{1}{\value{ct} < #1}%
{%
\pgfmathparse{\arabic{ct}/(1+#1)}\pgfmathresult,
}%
\pgfmathparse{\arabic{ct}/(1+#1)}\pgfmathresult
\setcounter{ct}{1}}

\tikzset{
    set arrow inside/.code={\pgfqkeys{/tikz/arrow inside}{#1}},
    set arrow inside={end/.initial=>, opt/.initial=},
    /pgf/decoration/Mark/.style={
        mark/.expanded=at position #1 with
        {
            \noexpand\arrow[\pgfkeysvalueof{/tikz/arrow inside/opt}]{\pgfkeysvalueof{/tikz/arrow inside/end}}
        }
    },
    arrow inside/.style 2 args={
        set arrow inside={#1},
        postaction={
            decorate,decoration={
                markings,Mark/.list={#2}
            }
        }
    },
}
\begin{document}

\arrowN{3}

\clearpage

\begin{tikzpicture}
    \begin{scope}[scale=2]
        \node[label=below:$A$] (A) at (0,0) {};
        \node[label=below:$B$] (B) at (2,0.25){};
        \draw plot [smooth,tension=1]
        coordinates {(A) (1,0) (1.14,-0.6) (0.5,-0.5) (0.5,0.5) (1.5,0) (B)}
        [red,arrow inside={end=stealth,opt={scale=2}}{0.25, 0.5, 0.75}];
        \draw [black] plot [smooth,tension=1]
        coordinates {(A) (1,0) (1.14,-0.6) (0.5,-0.5) (0.5,0.5) (1.5,0) (B)};
    \end{scope}
    \draw [fill=black] (A) circle (1pt);
    \draw [fill=black] (B) circle (1pt);
\end{tikzpicture}
\end{document}