graph = ({
nodes: Array.from({length:13}, () => ({})),
links: [
{ source: 0, target: 1 },
{ source: 1, target: 2 },
{ source: 2, target: 0 },
{ source: 1, target: 3 },
{ source: 3, target: 2 },
{ source: 3, target: 4 },
{ source: 4, target: 5 },
{ source: 5, target: 6 },
{ source: 5, target: 7 },
{ source: 6, target: 7 },
{ source: 6, target: 8 },
{ source: 7, target: 8 },
{ source: 9, target: 4 },
{ source: 9, target: 11 },
{ source: 9, target: 10 },
{ source: 10, target: 11 },
{ source: 11, target: 12 },
{ source: 12, target: 10 }
]
})