Mosca is an artistic homage to Walter Marchetti of Zaj. Marchetti created a work called "of a fly on window between 8 am and 7 pm one day in May, 1967," wherein he plotted the movements of a fly on a window between 8 am and 7 pm. Our work applies his idea to the web in a way that the flies are individual actors independently moving around on the screen under their own (random) will. The user, with a web-reflex of trying to interact with the moving flies, finds his way to the only link on the page. After clicking this link, the user is presented with a summary of his movements as he "interacted" with the flies, effectively converting the user into a fly himself.