we randomly select the transformation in a recursive way. 
The probability of the choice of a transformation must be related 
with the contraction ratio.
</p>
<p>You can change the transformations and find another fractal
</p>
<dl>
<dt><u>Function:</u> <b>sierpinskiale</b><i> (<var>n</var>)</i>
<a name="IDX2170"></a>
</dt>
<dd><p>Sierpinski Triangle: 3 contractive maps; .5 contraction constant and
translations; all maps have the same contraction ratio.  Argument <var>n</var> must
be great enougth, 10000 or 