demo.tex

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{automata, positioning}
\begin{document}
\begin{tikzpicture}
 \node[state,initial,accepting] (q0) {$q_0$};
 \node[state] (q1) at (1,2) {$q_1$};
 \node[state] (q2) [below right=of q0] {$q_2$};
 \path[->]
    (q0) edge node[above left] {hoge} (q1)
    (q1) edge[loop right] node[right] {hoge} (q1)
    (q1) edge[bend right=5] node[below left] {1 to 2} (q2)
    (q2) edge[bend right=5] node[right] {2 to 1} (q1)
    ;

 \path[->]
    (q2) edge[bend left=60] node[below left] {hoge} (q0)
    ;
\end{tikzpicture}
\end{document}