#!/bin/bash

fail()
{
	printf "${@}\n" >&2
	exit 1
}

FRAMES=()
while [ -n "${1}" ]
do
	case "${1}" in
		-p)
			PERIOD="${2}"
			shift 2;;
		-f)
			FILE="${2}"
			IFS="\n"
			while read LINE
			do
				FRAMES+=("${LINE}")
			done < "${FILE}"
			shift 2;;
		*)
			SEPARATOR="${1:0:1}"
			INPUT="${1:1}${SEPARATOR}"
			while [ -n "${INPUT}" ]
			do
				FRAMES+=("${INPUT%%${SEPARATOR}*}")
				INPUT="${INPUT#*${SEPARATOR}}"
			done
			shift;;
	esac
done
[ -n "${PERIOD}" ] || PERIOD=0.2
[ -n "${FRAMES}" ] || fail "Syntax: ${0} [ -p PERIOD ] FRAMES"
N=0

while true
do
	printf "\r${FRAMES[$N]}"
	N=$(((N + 1) % ${#FRAMES[@]}))
	sleep $PERIOD
done