Gas Fee Market: EIP-1559 Mempool Simulator

Every mobile crypto wallet quietly runs this exact algorithm before it shows you a "gas fee" number. This simulator renders the Ethereum EIP-1559 fee market in 3D: a mempool of pending transactions floats as a cloud of spheres colored by how competitive their tip is, and a conveyor of mined blocks streams past showing how full each one ran. Raise network demand and watch the base fee compound upward, block after block, capped at ±12.5% per step exactly as the protocol specifies; drop it and watch the base fee decay back toward the floor. Submit your own transaction with a chosen max-fee cap and priority tip to see, block by block, whether it gets swept into inclusion or left waiting in the mempool — the same trade-off a mobile wallet's "slow / average / fast" gas presets are built on.