cos(x*pi) * cos(x*3*pi) * cos(x*5*pi) * cos(x*7*pi) + sin(x*25*pi) * 0.1
this formula gives you a nice smooth looking animation with not too much repetitance. apply that to pan and tilt and maybe even to its position, maybe with different factors. try replacing some of the numbers by different ones, e.g. cos(x*13*pi) or the like. i think you get the idea.
joey.
