mas02md@547: \draw (-2,0.8) rectangle (1.2,1);
mas02md@547: % stupid floating point.
mas02md@547: \foreach \x in {-1.6,-1.2,...,0.9} {
mas02md@547:   \draw(\x,0.8) -- (\x,1);
mas02md@547: }
mas02md@547: \begin{scope}[->,>=stealth]
mas02md@547:   \fill (-1.8,0.9) ellipse (0.05);
mas02md@547:   \draw (-1.8,0.9) -- (-2.5,0.2);
mas02md@547:   \draw (-1.8,0.9) -- (-2,0.2);
mas02md@547:   \fill (-1.4,0.9) ellipse (0.05);
mas02md@547:   \draw (-1.4,0.9) -- (-2,0.2);
mas02md@547:   \draw (-1.4,0.9) -- (-1.4,0.2);
mas02md@547:   \fill (-1.0,0.9) ellipse (0.05);
mas02md@547:   \draw (-1.0,0.9) -- (-1.4,0.2);
mas02md@547:   \draw (-1.0,0.9) -- (-0.5,0.2);
mas02md@547:   \fill (-0.6,0.9) ellipse (0.05);
mas02md@547:   \draw (-0.6,0.9) -- (-0.5,0.2);
mas02md@547:   \draw (-0.6,0.9) -- (0,0.2);
mas02md@547:   \fill (-0.2,0.9) ellipse (0.05);
mas02md@547:   \draw (-0.2,0.9) -- (0,0.2);
mas02md@547:   \draw (-0.2,0.9) -- (0.8,0.2);
mas02md@547:   \fill (0.2,0.9) ellipse (0.05);
mas02md@547:   \draw (0.2,0.9) -- (0.8,0.2);
mas02md@547:   \draw (0.2,0.9) -- (1.3,0.2);
mas02md@547:   \fill (0.6,0.9) ellipse (0.05);
mas02md@547:   \draw (0.6,0.9) -- (1.3,0.2);
mas02md@547:   \draw (0.6,0.9) -- (1.8,0.2);
mas02md@547:   \fill (1.0,0.9) ellipse (0.05);
mas02md@547:   \draw (1.0,0.9) -- (1.8,0.2);
mas02md@547:   \draw (1.0,0.9) -- (2.5,0.2);
mas02md@547: \end{scope}