# Example

          %%{init:{"theme":"base", "themeVariables": {"lineColor":"red"}}}%%
          flowchart LR
          subgraph red
          A --> B
          end

          %%{init:{"theme":"base", "themeVariables": {"lineColor":"blue"}}}%%
          flowchart LR
          subgraph black
          A --> B
          end

          ---
          config:
            theme: base
            themeVariables:
              lineColor: yellow
          ---
          flowchart LR
          subgraph red
          A --> B
          end

          ---
          config:
            theme: base
            themeVariables:
              lineColor: green
          ---
          flowchart LR
          subgraph black
          A --> B
          end