set term pngcairo enh font "Helvetica,14" size 480,360
set out "colorseq.png"
set border 0
set notics
set xrange [0:1]
set yrange [0:1]
set key spacing 0.9 samplen 8 font ",12"
set label "default" at sc 0.18,0.96
set label "classic" at sc 0.47,0.96
set label "podo" at sc 0.76,0.96


set multiplot lay 1,1
#
set colorseq default
set key left center
plot for [i=1:16] 1/0 w l lt i lw 10 t sprintf("  %d",i)
#
set colorseq classic
set key center
plot for [i=1:16] 1/0 w l lt i lw 10 t sprintf("  %d",i)
#
set colorseq podo
set key right
plot for [i=1:16] 1/0 w l lt i lw 10 t sprintf("  %d",i)
#
unset multiplot

!display "colorseq.png"