1 \documentclass[tikz
]{standalone
}
2 \usetikzlibrary{arrows.meta,shapes.symbols,matrix,positioning
}
4 \begin{tikzpicture
}[node distance=
7em,nodes=
{draw,minimum width=
5em
}]
6 \node (
2)
[right of=
1] {unstable
};
7 \node (
3)
[right of=
2] {stable
};
10 \draw [->
] (
2) -- (
1);
11 \draw [->
] (
2) -- (
3);
12 \draw [->
] (
1.north east) to
[out=
25,in=
155] (
3.north west);