You need this:

Photo: deco & style
- narrow ribbons (decolouring)
- various glass prisms (eg from Leonardo, Habitat, Dekoladen)
- Curtain rod (eg from Ikea)
- scissors
It's that easy:
1. Tie narrow bands to the glass prisms. To do this, cut off the bands very diagonally so that they fit through the drilled holes in the prisms.
3. Band ends z. B. festknoten on a curtain rod.