marquee

Hi there,
On my html page I want my image of clouds
move right over the mountains..I used marquee/direction/right..
but image(bmp) disappears after few seconds.and there is a blank sky (space)
until the image appears again from the left-side ..how can I make my image movement continous
(without any break)

<marquee direction=right behaviour=scroll> your image tag goes here </marquee>

hope this is wht u require...