# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'fillcrvs.2.png'
set key out top Right noreverse noinvert enhanced box linetype -2 linewidth 1.000 samplen 4 spacing 1 width 0 height 0 autotitles
set title "Intersection of two parabolas" 0.000000,0.000000  font ""
plot x*x with filledcurves, 50-x*x with filledcurves, x*x with line 1