how to store data of tree structure in firebase? in android studio project

[jughoor]

I want to store data of tree structure in Firebase DB, below is the JSON of which i want to store in the Firebase DB.

[
{
"block": [
  {
"blockname": "first block",
"blockintervel": "daily",
"blockpic": "SDFsdfsdfgfhfghfgggfghfg",
"block": [
  {
    "blockname": "first block",
    "blockintervel": "daily",
    "blockpic": "SDFsdfsdfgfhfghfgggfghfg",
    "block": []
  }
]
  }
]
  },
  {
"block": [
  {
"blockname": "first block",
"blockintervel": "daily",
"blockpic": "mypic",
"block": [
  {
    "blockname": "first block",
    "blockintervel": "daily",
    "blockpic": "mypic",
    "block": []
  }
]
  }
]
}
]

Please help me with some code snippet.