Classic Flowchart

{
  "nodes": [
    { "id":"s",  "type":"terminator", "label":"Start", "x":40, "y":40, "fill":"#dcfce7" },
    { "id":"in", "type":"manual-input", "label":"Enter request", "x":40, "y":140 },
    { "id":"p1", "type":"process", "label":"Validate input", "x":260, "y":140 },
    { "id":"d1", "type":"decision", "label":"Valid?", "x":480, "y":130 },
    { "id":"e",  "type":"document", "label":"Error report", "x":700, "y":40 },
    { "id":"p2", "type":"process", "label":"Persist", "x":700, "y":160 },
    { "id":"db", "type":"database", "label":"Orders DB", "x":900, "y":160 },
    { "id":"end","type":"terminator", "label":"End", "x":700, "y":300, "fill":"#fee2e2" }
  ],
  "edges": [
    { "id":"e1","source":"s","target":"in" },
    { "id":"e2","source":"in","target":"p1" },
    { "id":"e3","source":"p1","target":"d1" },
    { "id":"e4","source":"d1","target":"e","label":"no" },
    { "id":"e5","source":"d1","target":"p2","label":"yes" },
    { "id":"e6","source":"p2","target":"db" },
    { "id":"e7","source":"e","target":"end" },
    { "id":"e8","source":"p2","target":"end" }
  ]
}