\begin{figure}[H]
    \begin{algorithm}[H]
    \caption{Metropolis-Hastings Algorithm}
    \label{algo:metropolis}
        \begin{algorithmic}
            \Procedure{Metropolis}{$lattice, energy, magnetization$}
            \For{ Each spin in the lattice }
            \State $ri \leftarrow \text{random index of the lattice}$
            \State $rj \leftarrow \text{random index of the lattice}$
            \State $dE \leftarrow 2 \cdot lattice_{ri,rj} \cdot (lattice_{ri,rj-1} + lattice_{ri,rj+1} 
            + lattice_{ri-1,rj} + lattice_{ri+1,rj} )$

            \State $rn \leftarrow \text{random number} \in [0,1)$
            \If{$rn \leq e^{- \frac{dE}{T}}$}
                \State $lattice_{ri,rj} = -1 \cdot lattice_{ri,rj}$
                \State $magnetization = magnetization + 2 \cdot lattice_{ri,rj}$
                \State $energy = energy + dE$
            \EndIf
            \EndFor
            \EndProcedure
        \end{algorithmic}
    \end{algorithm}
\end{figure}