Package algorithm

I am using algorithm package in order to create a pseudocode. But I would like to modify the way it appears some lines.

Here is my code:

\documentclass[twoside,12pt]{book}
\usepackage{algorithm}
\usepackage{algorithmic}

\begin{document}

\begin{algorithm}
\begin{algorithmic}[1]
\STATE Construcción de Soluciones
\STATE Actualización de feromona
\STATE Acciones del demonio
\end{algorithmic}
\caption{Procedimiento de ACO}\label{alg:algoritmoRaro}
\end{algorithm}

\end{document}


I would like the text "Actividades Programadas" to appear in bold and with not number. Also Construcción de Soluciones, Actualización de feromona, Acciones del demonio to be number and indented.

Below I provide \nonumSTATE to set a regular \STATE without the numbering. Also, \BEGININDENT...\ENDINDENT is an environment that indents its contents.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{algorithm,algorithmic}

\makeatletter
\newcommand{\nonumSTATE}{\item[]}
\newcommand{\BEGININDENT}{\begin{ALC@g}}
\newcommand{\ENDINDENT}{\end{ALC@g}}
\makeatother

\begin{document}

\begin{algorithm}
\begin{algorithmic}[1]

Setting the \nonumSTATE to be bold automatically is possible (for example, if you write your code to supply the content as an argument - like you did in the original post), but using \textbf or \bfseries seems sufficient.