Bash Script Template, copy useful parts.

bstemplate.bash

#!/usr/bin/env bash


# No argument version (any argument prints help)
if [ $# -gt 0 ] ; then
	echo "$(echo $0 | sed "s;$HOME;~;")"
	echo "Help command output"
	exit 0
fi

# Sudo-only script with no arguemnts
if [ $# -gt 0 ] || [[ $UID != 0 ]] ; then
	if [[ $UID != 0 ]] &&  [ $# -eq 0 ]; then
		echo "Usage:        sudo $(echo $0 | sed "s;$HOME;~;")"
		echo "Help message: $(echo $0 | sed "s;$HOME;~;") -h"
		echo
		echo "Run with sudo to ..."
	else
		echo "sudo $(echo $0 | sed "s;$HOME;~;")"
		echo "Help command output"
	fi

	if [[ $UID != 0 ]] ; then exit 1; else exit 0; fi
fi


# Standard bash stuff to get the current directory
unset CDPATH
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
	DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
 	SOURCE="$(readlink "$SOURCE")"
	[[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
cd $DIR

# ColorStuff
txtrst=$(tput sgr0)
txtbold=$(tput bold)
# Use $(tput setaf 1), etc to set color

# Color loop
var=1
maxvar=8
for i in ...; do
	echo -n "$(tput setaf $var)"
	...
	echo "$txtrst"
	[ $var = 6 ] && var=8
	var=$(((var+1)%maxvar))
done