I printed the pattern on transparent paper. Then I stuck behind a mirror film. You can download the pattern in the image gallery.
The parts are glued together with superglue .
The base is fixed with PHS screws M2*10 and Nuts M2.
Black cylinders on the edges of the pyramid are painted metal rods.
I used four AAA batteries, a switch, two resistors 180 Ohms and 4 red LED 1250 mcd.