You'll need some 1/2 inch or 3/4 inch PVC tubing. I think they only come in 8' or 10' lengths, so I didn't measure each of the pieces out, since it doesn't really matter what the exact sizing is.
I would also invest the $12 in a PVC cutter. I have one from making a bunch of marshmallow shooters
for Christmas gifts last year. If you don't have one, you'll need to use a hack saw to make all of your cuts.
I used 3/4 inch PVC since I already had them for a future project that I haven't gotten around to.
Just make sure all your connectors are smooth inside and not threaded.
Follow the image below and cut your pieces out.