I want a mega structure - a million...

I want a mega structure - a million blocks or more. The structure should be futuristic, intricate, and unique. It should feel almost like a castle, but not as uniform. More chaotic with little details and asymmetries. What I want to emphasize most is that the walls should follow a gradient that flows seamlessly from bright red to bright purple. No other blocks obscuring that gradient. I don’t want it to feel flat or 2 dimensional, so add as much depth as needed to make it look good. But everything externally should appear to be a perfect flow of colors. Make it cool, unique, and most of all, bright. I want a lot of brightness, not just color.