Table and Cell Gradients

digraph G {
  fontname="Helvetica,Arial,sans-serif"
  node [fontname="Helvetica,Arial,sans-serif"]
  edge [fontname="Helvetica,Arial,sans-serif"]
  a0 [shape=none label=<
 <TABLE border="0" cellspacing="10" cellpadding="10" style="rounded" bgcolor="/rdylgn11/1:/rdylgn11/11" gradientangle="315">
  <TR><TD bgcolor="/rdylgn11/1:/rdylgn11/2">00</TD>
  <TD bgcolor="/rdylgn11/2:/rdylgn11/3">01</TD>
  <TD bgcolor="/rdylgn11/3:/rdylgn11/4">02</TD>
  <TD bgcolor="/rdylgn11/4:/rdylgn11/5">03</TD>
  </TR>
  
  <TR><TD bgcolor="/rdylgn11/1:/rdylgn11/6" gradientangle="270">10</TD>
  <TD rowspan="2"  bgcolor="/rdylgn11/3:/rdylgn11/9" gradientangle="270">11</TD>
  <TD bgcolor="/rdylgn11/3:/rdylgn11/8" gradientangle="270">12</TD>
  <TD bgcolor="/rdylgn11/4:/rdylgn11/9" gradientangle="270">13</TD>
  </TR>
  
  <TR><TD bgcolor="/rdylgn11/6:/rdylgn11/9" gradientangle="270">20</TD>
  <TD colspan="2"  bgcolor="/rdylgn11/9:/rdylgn11/11">22</TD>
  </TR>
  
  <TR><TD style="radial" bgcolor="/rdylgn11/1:/rdylgn11/8">30</TD>
  <TD style="radial" bgcolor="/rdylgn11/1:/rdylgn11/8" gradientangle="45">31</TD>
  <TD style="radial" bgcolor="/rdylgn11/1:/rdylgn11/8" gradientangle="90" >32</TD>
  <TD style="radial" bgcolor="/rdylgn11/1:/rdylgn11/8" gradientangle="180">33</TD>
  </TR>
  
</TABLE>>];

}