yes, its is a cube which i have subsurfed and subdivided with two cuts, taken out the middle face on each side,mae it translucent, then placed a light source in side it
Edit: if anyone knows how to save and animation inn blender so that i can upload it here i would be grateful if you could tell me how
on ur buttons toolbar, click "scene (F10)" which will show you a bunch of stuff. In the sub button you will need to click "Render Buttons", then click "Render".
The animate button will render all frames in range ;-)
EDIT: these will save to "Ctmp\" by default.