#!/usr/bin/env perl
use open ':std', ':encoding(UTF-8)';
my $block = shift || (chr(0x2588) x 3);
for (["", 0], ["1;", 0], ["", 8], ["1;", 8]) {
	my ($bold, $offset) = @$_;
	my @range = map $offset + $_, 0..7;
	printf "%s %-6s ", $bold ? "bold" : "norm", "$range[0]-$range[-1]";
	print map("\e[${bold}38;5;${_}m$block", @range), "\e[0m";
	print "\n"
}