First download the template and print it out. Now transfer the template 10 times onto the crosses and Lamp foilcut them out. Label or paint the foil as you like with a paint marker
Cut carefully with a Cutter enter the cross you have marked. Now bend the indicated crease edges of the template. Put double-sided glue on the glue wheels or the crease edges and Adhesive tapeglue everything together. Finally, insert the fairy lights into the already cut crosses.