tikzset{
            bloc/.style={
                anchor=south west,
                draw,
                minimum height=0.7cm,
                align=left,
                font=small
            },
        }


begin{tikzpicture}
    node[bloc, minimum width=5.5cm,
          fading transform={xshift=-3cm},
          left color=green!60!black!80,
          right color=red!60]
    at (-9,0.5) {Initialize process};
end{tikzpicture}