Step 1: Design
The actual top consists of two layers of 1/4" plexiglass with a piece of white cloth sandwiched between them. This is done to make the tops opaque and scatter the light better, this way it looks like the top is glowing.
The legs are simple lengths of 2x6's
The triangle sections between the 2x6's and the underside of the table top are just 45 degree cuts out of pieces of 2x6's.
Below is the general design.