documentclass[tikz]{standalone}
usepackage{tikz}
begin{document}

foreach n in {0,0.05,...,1} {
begin{tikzpicture}
draw
    (0,0)   -- ++ (1,2)
            -- ++ (1,.5)
            -- ++ (1,-1)
            -- ++ (1,0)
            -- ++ (1,-4);
end{tikzpicture}
}

end{document}

documentclass[tikz, border=.5cm]{standalone}
usepackage{tikz}
begin{document}

foreach n in {0,0.1,...,.9} {
begin{tikzpicture}
    draw
        (0,0)   -- node [circle, fill=red, draw=black, pos=n, inner sep = 0, minimum size = 4pt] {} node [pos=n, above] {x} ++ (1,2)
                -- ++ (1,.5)
                -- ++ (1,-1)
                -- ++ (1,0)
                -- ++ (1,-4);
end{tikzpicture}
}

foreach n in {0,0.1,...,.9} {
begin{tikzpicture}
    draw
        (0,0)   -- ++ (1,2)
                -- node [circle, fill=red, draw=black, pos=n, inner sep = 0, minimum size = 4pt] {} node [pos=n, above] {x} ++ (1,.5)
                -- ++ (1,-1)
                -- ++ (1,0)
                -- ++ (1,-4);
end{tikzpicture}
}

foreach n in {0,0.1,...,.9} {
begin{tikzpicture}
    draw
        (0,0)   -- ++ (1,2)
                -- ++ (1,.5)
                -- node [circle, fill=red, draw=black, pos=n, inner sep = 0, minimum size = 4pt] {} node [pos=n, above] {x} ++ (1,-1)
                -- ++ (1,0)
                -- ++ (1,-4);
end{tikzpicture}
}

foreach n in {0,0.1,...,.9} {
begin{tikzpicture}
    draw
        (0,0)   -- ++ (1,2)
                -- ++ (1,.5)
                -- ++ (1,-1)
                -- node [circle, fill=red, draw=black, pos=n, inner sep = 0, minimum size = 4pt] {} node [pos=n, above] {x} ++ (1,0)
                -- ++ (1,-4);
end{tikzpicture}
}

foreach n in {0,0.1,...,.9} {
begin{tikzpicture}
    draw
        (0,0)   -- ++ (1,2)
                -- ++ (1,.5)
                -- ++ (1,-1)
                -- ++ (1,0)
                -- node [circle, fill=red, draw=black, pos=n, inner sep = 0, minimum size = 4pt] {} node [pos=n, above] {x} ++ (1,-4);
end{tikzpicture}
}

begin{tikzpicture}
    draw
        (0,0)   -- ++ (1,2)
                -- ++ (1,.5)
                -- ++ (1,-1)
                -- ++ (1,0)
                -- node [circle, fill=red, draw=black, pos=1, inner sep = 0, minimum size = 4pt] {} node [pos=1, above] {x} ++ (1,-4);
end{tikzpicture}

end{document}