documentclass[border=5mm]{standalone}
usepackage{pgfplots}
pgfplotsset{compat=1.10,
             ticks=none}
usepgfplotslibrary{fillbetween}
usetikzlibrary{backgrounds,
                calc,
                patterns}

begin{document}

begin{tikzpicture}[scale=4, transform shape]
tikzset{
    myc/.pic={
    draw[line width=2mm] (0, 0) -| (2, 1) -| (1, 2) -| (2, 3) -| cycle;
        }
}
path (0,0) pic[fill=green] {myc} (1,3) pic[fill=blue] {myc} (2,6) pic[fill=blue] {myc};
end{tikzpicture}

end{document}