A lot of people put up garland at Christmas time, but I made some that we put up at Halloween.
I had some left over fabric from multiple projects, and I cut it into long strips. I used black, orange, green and a green and blue netting. Once I had the strips cut, I gathered them together at the top and secured them with a rubber band. I then hooked the rubber band on small nails that I placed just above the door frame. We leave the nails in year round, since no one can see them anyway.
I think that leaving the fabric with the cut edges which will fray a little adds to the Halloween feel.