Fold the paper in half long ways. Mark the width of the first triangle on the fold and then make your mark for the triangle point below that. The triangle point mark should be centered between the top two width marks.
Cut your triangle out following your marks. This is going to be your pattern.
You should have a double triangle that is connected at the top.
Now open up the triangle and place the fold seam on top of your paper fold. Use this as a guide to cut out your next triangle. I just held it on with my hands and cut next to it, no marking needed.
Repeat the triangle cutting until you have as many triangles as you like. Assorted papers are really pretty.
Cut your ribbon to twice the length you want your bunting (so you have tails to tie it onto something). Open up the triangle, slather one inside triangle with the glue stick, place the ribbon (leaving a ribbon end out for a tying tail) at the top near the fold and then close the other triangle on top of the glue.
Repeat gluing onto the string with your other triangles.