set terminal postscript eps 22; set output 'tree.eps'

set nokey
set noxtics
set noytics
set noztics

set noborder

set pointsize 1.5

set size 0.8,1.0

# max depth of tree
set xrange [-8:8]
set yrange [-8:8]

plot 'points' u 1:2 with linesp pt 7