This is a very strange story you tell! You are very lucky that nothing bad happened to either you or your friend, that you were only scared. The Masquerade you mention is different from anything that we have in America, although we do have some carnival parades and events such as Mardi Gras in New Orleans, Louisiana, every year. You mention that you saw the 'nakedness' of the masqueraders? So they were performing their play in the nude? In other parts of Africa, initiations, usually of young men, are done privately, inside lodges or village halls, so that the ceremonies are secret. Women are definitely forbidden from attending or viewing such secret rituals. Yes, you were lucky to get away safely!

What is the group dressed and decorated in blue paint? Are they Nigerian performers or masqueraders? Is this a kind of Carnival?

Keep reading more and more English language books and websites, and write every chance you get! This contest is helping your English skills get better and better! Please, write some more!