set size 1,1
set terminal postscript eps 25 enh
set output "itl_search.eps"

#set terminal pdf
#set output "itl_search.pdf"

set xrange [0:1.1]
set yrange [0:1.4]
unset xtics
unset ytics
set border 3
#set zeroaxis


set arrow from .1,1 to .1,.1 nohead lt 5 lw 7
set arrow from .1,.1 to 1,.1 nohead lt 5 lw 7

set arrow from .2,1 to .2,.3 nohead lt 7 lw 7
set arrow from .2,.3 to 1,.3 nohead lt 7 lw 7

set arrow from .25,.50 to .25,.75 nohead lt 6 lw 7
set arrow from .25,.75 to .80,.75 nohead lt 6 lw 7
set arrow from .80,.75 to .80,.50 nohead lt 6 lw 7
set arrow from .80,.50 to .25,.50 nohead lt 6 lw 7

set arrow from 0,1 to 1,1 nohead lt 1 lw 7
set arrow from 1,1 to 1,0 nohead lt 1 lw 7

plot -1 lt 1 lw 7 title "first iteration",\
     -1 lt 5 lw 7 title "second iteration",\
     -1 lt 7 lw 7 title "third iteration",\
     -1 lt 6 lw 7 title "fourth iteration"