Random Generated Concept 01

So had this idea as a personal challenge where i make several categories and roll a dice with each to get a random 2 week theme. A lot of my colleagues were keen on the idea so it became a thing. First one was Medium - Mech or robot - Inspired by WW1 or 2 - In Space - Colour Purple must be used.
My idea was based on the German Flak towers and 88mm guns