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


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

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,.3 to .2,.5 nohead lt 6 lw 7
set arrow from .2,.3 to .4,.3 nohead lt 6 lw 7
set arrow from .4,.5 to .4,.3 nohead lt 6 lw 7
set arrow from .4,.5 to .2,.5 nohead lt 6 lw 7

set arrow from .55,.55 to .55,.75 nohead lt 6 lw 7
set arrow from .55,.55 to .75,.55 nohead lt 6 lw 7 
set arrow from .75,.75 to .75,.55 nohead lt 6 lw 7 
set arrow from .75,.75 to .55,.75 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"