%%{
  init: {
    'theme': 'base',
    'themeVariables': {
      'primaryColor': '#1A836D',
      'primaryTextColor': '#0D1117',
      'primaryBorderColor': '#1D5116',
      'lineColor': '#1B3E83',
      'secondaryColor': '#093F42',
      'tertiaryColor': '#B0B0B0'
    }
  }
}%%
  flowchart RL;
    M(Math) --> C(Chess)
    M <--> P(Programming)
    C <--> P
    C & P --> G(Games)
    B(Books)
    A(Art) --> B
    A --> B
    E(Economics) <--> M & G
    B --> C
    E --> B
    A & M & G --> L(Lego)
    L --> P
    H(Hardware) --> L & G
    H <--> P
    B --> H
    C <--> N(Neuroscience)
    G <--> N
    E --> N
    O(Origami) --> A
    O --> M & B & H
    O <--> M