You may have all the parts just not the tools. I used a 3/4 piece of laminant shelf material cut on a table saw into 3.5 in strips. I then used the table saw to cut a groove for the glass. A compound miter saw to cut the lengths. The key is the mitered joints.
The back is strips of an old patio table glued to a piece of thin plywood. I painted them metallic grey with a textured "hammered" finish. I then used a ceiling light grid and spayed black and silver.
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A rounded tip makes it spin nicely in my palm. It also is safer for when I drop it on the floor
The thing with the knife...
The thing with the knife - YouTube