Variant demo

This demo shows a graph with parameter variants (hexagons in mermaid).

Execution Graph

```mermaid
flowchart TD
    node0[Generate]
    node1{{Scale}}
    node2{{Offset}}
    node3[Stats]
    node0 --|data|--> node1
    node1 --|data|--> node2
    node2 --|data|--> node3
```