gaal gergely recipe for easy jedi laser sword:
1. erase the basic cube, that appears, when you open blender.
2. hit "space", choose add-plane.
3. if you not in edit mode, hit tab
4. press "w", and choose subdivide. do this 3-4 time.
5. now, you have a nice plane subdivided for to many faces, we
dont need that, we just need the left colum side of vertices.
so... hit "b" to box select mode, and drag a nice selection for
all the unwanted vertices.
6. go to materials panel, and add a new material.
7. chose material tipe "halo", adjust the colors (example red).
8. render "f12-key".