\usepackage{mathabx}
\newcommand \itemstepi {{\LARGE $\rightsquigarrow$ \hspace{.5ex}}}
\newcommand \itemstepii {{\LARGE \quad \quad $\looparrowdownright$} \quad}
\newcommand \itemstepiii {{\LARGE \quad \quad} \itemstepii}
\newcommand \itemstepiiii {{\LARGE \quad \quad} \itemstepiii}
\newcommand \itemstepiiiii {{\LARGE \quad \quad} \itemstepiiii}
\newcommand \itemstepiiiiii {{\LARGE \quad \quad} \itemstepiiiii}
\newcommand \itemstepiiiiiii {{\LARGE \quad \quad} \itemstepiiiiii}