Graffiti is the most conspicuous form of artistic expression in Libya at the moment. In the past, artists were only allowed to glorify Muammar Gaddafi - the country's president on the run - and vilify the West. br br Now that things have changed Gaddafi has become the target of satire and ridicule through Graffiti. br br The country's artists are venting their frustration and anger at the man who ruled them for so many years through their public depictions. br br Al Jazeera's Hashem Ahelbarra reports from Tripoli.