{ signal: [
  { wave: '10..x...1', node: '.........'},
  {                    node: '.f..g....'},
  {                    node: '.X.. h...'},
  {                    node: '.Y......i'}
  ],
  edge: [
    'f-g t4',
    'X-h t5',
    'Y-i t6',
  ]
}