Partitioning off room, need door ideas

Hi everyone, I'm going to partition off a piece of my room to grow in. I will be using panda film, I read that you need to put two sheets black sides together to partition off a room. So how do I make the door? Any light leak proof ideas? Every idea I'm coming up with really sucks so far.

use an sick on zipper your local grow shop should carry those

Saaaa WHeeeat Thanks bro for the pointer