PlayLoopedFX( <effect id>, <repeat delay>, <position>, <cull distance>, <forward>, <up> )
Play this effect in a loop.
fx = PlayLoopedFX( id, ent, tag );
1 : <effect id> The effect id returned by loadfx.
2 : <repeat delay> The delay between each loop.
3 : <position> The position of the effect.
1 : <cull distance> The culling distance of the effect. 0 means that the effect won't be culled
2 : <forward> The forward vector for the effect
3 : <up> The up vector for the effect