"Create an economy diagram...

"Create an economy diagram with two parallel flows: Gold and Elixir. Add two Sources: 'Gold Mine' and 'Raid Loot' feeding into a 'Gold Pool'. Add two Sources: 'Elixir Collector' and 'Raid Loot' feeding into an 'Elixir Pool'. Create a Drain 'Building Upgrade' that consumes from Gold and Elixir. Add a 'Builder Pool' (capacity 5) that acts as a gate for the Upgrade Drain. Add a Register called 'Momentum Engine' with a State Connection to the Upgrade Drain to decrease its interval by 10% per stack."