set term pngcairo enh font "Arial,6" size 480,360
set out "multi_styles.png"
set xr [0:10]
set yr [-1.2:1.2]
set style fill so 0.5 noborder
set multiplot layout 2,3
do for [name in "sin(x) cos(x) besj0(x) besj1(x) besy0(x) besy1(x)"] {
  eval sprintf("plot %s w filledc y1=0 lc rgb 'dark-green'", name)
}
unset multiplot