Champions League Draw

[The Doctor]

Can somebody please explain the CL draw.
I follow the rules that say you can't draw a team from your own pot or your own country in the group stage but what's all this about red & blue? Is it another form of seeding? When Borussia came out they said only possibility was was group D but United's group H did not have a German Team so why was that not an option.
What are the rules?

 

[Deleted member 14625]

There are two halves of the draw and we can't play at home on the same night as United, plus us and Chelsea cant play on the same night as both United and Arsenal even if we weren't from the same city due to tele airings. Same applies in other countries. So if Bayern were on one half of the draw, Dortmund had to be in the other.

 

[The Doctor]

There are two halves of the draw and we can't play at home on the same night as United, plus us and Chelsea cant play on the same night as both United and Arsenal even if we weren't from the same city due to tele airings. Same applies in other countries. So if Bayern were on one half of the draw, Dortmund had to be in the other.

Thank you...............