Bubbles! Graphviz Diagram

bubbles.dot

digraph bubbles {
    node [
      color=lightcyan2,
      style=filled,
      fillcolor=lightcyan
    ]
    edge [
      color=white
    ]
    
    A [label="\n\n"]
    B [label="\n\n"]
    C [label="\n\n"]
    D [label="\n\n"]
    E [label="\n\n"]
    F [label="\n\n"]
    G [label="\n\n"]
    H [label="\n\n"]
    I [label="\n\n"]
    J [label="\n\n"]
    K [label="\n\n"]
    L [label="\n\n"]
    
    A -> B -> C
    B -> D
    G -> H
    D -> C
    D -> L
    I -> J -> K
    J -> L
}

bubbles.png