# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'fillcrvs.3.png'
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics nortics nomrtics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid front   lt 0 linecolor 0 linewidth 0.500,  lt 0 linecolor 0 linewidth 0.500
set key outside right top vertical Right noreverse enhanced autotitle nobox
set title "Filled sinus and cosinus curves" 
NO_ANIMATION = 1
plot 2+sin(x)**2 with filledcurve x1, cos(x)**2 with filledcurve x1