#!/bin/sh encode_png() { pngchat encode ./test.png ruSt "This is a hidden message" } decode_png() { pngchat decode ./test.png ruSt } remove_png() { pngchat remove ./test.png ruSt } print_png() { pngchat print ./test.png } echo "Encoding message..." encode_png decode_png echo "Removing message..." remove_png print_png