set term png
set output 'heal.png'

set grid
set xlabel 'hitpoints'
set ylabel 'probability'
set title 'Greater healing'
set xrange [0:1500]
set yrange [0:1]

set multiplot
plot 'data.txt' using 1:2 title 'animal' with lines, \
'data.txt' using 1:3 title 'demon' with lines, \
'data.txt' using 1:4 title 'undead' with lines, \
'data.txt' using 1:5 title 'normal' with lines
unset multiplot

#pause -1 "Press return"
reset