RUBY Filter to event.set each entity in an Array

I am stuck on how to use a Ruby script to manipulate a field with in an array. If anyone can help with this I need to take the Field "[body][entities][sentiment][confidence]" and * 100 and add that as another Field "[body][entities][sentiment][probability]" for each entity
Example

if [body][entities][sentiment][label] == "pos"
  {
ruby { code => 'event.set("[body][entities][sentiment][probability]" , (event.get("[body][entities][sentiment][confidence]").to_f * 100)).to_f' }
  }

Here is the Single JSON Document.

{
  "_index": "logstash-2021.02",
  "_type": "_doc",
  "_id": "1111",
  "_score": 1,
  "_source": {
    "body": {
      "entities": [
        {
          "normalized": "NAME1",
          "sentiment": {
            "label": "pos",
            "confidence": 0.5776256
          }
        },
        {
          "normalized": "NAME2",
          "sentiment": {
            "label": "pos",
            "confidence": 0.47355394
          }
        },
        {
          "normalized": "NAME3",
          "sentiment": {
            "label": "pos",
            "confidence": 0.57258118
          }
        },
        {
          "normalized": "NAME4",
          "sentiment": {
            "label": "pos",
            "confidence": 0.61671584
          }
        }
      ]
    },
    "reference": "TEST",
    "@timestamp": "2021-02-05T09:00:11.000Z",
    "tags": [
      "TEST"
    ],
    "@version": "1",
    "type": "document"
  },
  "fields": {
    "@timestamp": [
      "2021-02-05T09:00:11.000Z"
    ]
  }
}

I have not tested it but you would have to do something like

ruby {
    code => '
        entities = event.get("[body][entities]")
        if entities.is_a? Array
            entities.each_index { |x|
                entities[x]["sentiment"]["probability"] = entities[x]["sentiment"][confidence] * 100
            }
            event.set("[body][entities]", entities)
        end
    '
}

It worked just missed some quotes around [confidence] * 100 should be ["confidence"] * 100
Was also able to add some if's in there for different formulas.
Thanks again for the help.