#!/bin/sh

pause() {
  printf "=>push return<= "
  read dummy
}

seq 0 15 | while read c; do
  printf "\033[48;5;${c}m  "
done

printf "\033[m\n"

pause

seq 0 15 | while read c; do
  printf "\033]4;${c};#%1x%1x%1x\033\\" $c $c $c
done

pause

seq 0 15 | while read c; do
  printf "\033]104;${c}\033\\"
done