<center><img src="sierp.png"></center><br/><center><textarea class="console" cols="80" rows="7">
gnuplot> set terminal png size 480,360
gnuplot> set output "sierp.png"
gnuplot> set size ratio 1
gnuplot> set object rectangle from screen 0,0 to screen 1,1 behind fillcolor rgb 'black' fillstyle solid noborder
gnuplot> plot "sierp-out.txt" with dots lc rgb "green"
</textarea></center>
