Populate with ampscript then run with ssjs activity. Create many data extensions with SSJS and ampscript

createdManyDeWithSsjs.ssjs

// populate with ampscript
%%[
/* Replace 'thisIsTheSourceDe' with the actual name of your data extension */
var @dataExtensionName
set @dataExtensionName = "thisIsTheSourceDe"

/* Replace 'myCustomerKey' with the actual field name you want to populate */
var @fieldName
set @fieldName = "myCustomerKey"

/* Retrieve all the records from the data extension */
var @rows
set @rows = LookupRows(@dataExtensionName, "myCreatedDeName","1")

/* Check if there are any records found */
var @rowCount
set @rowCount = RowCount(@rows)

/* If there are records found, loop through each record and display the value of the field */
if @rowCount > 0 then
  for @i = 1 to @rowCount do
    var @row
    set @row = Row(@rows, @i)
    
    /* Replace 'fieldName' with the actual attribute name of your field */
    var @fieldValue
    set @fieldValue = Field(@row, "myCustomerKey")
  ]%%  
  <p>    
 var deObj%%=v(@i)=%% = { <br>
       CustomerKey: "%%=GUID()=%%",<br>
       Name: "%%=v(@fieldValue)=%%",<br>
       Fields: [<br>
                    { "Name": "EmailAddress", "FieldType": "EmailAddress", "IsPrimaryKey": true, "IsRequired": true },<br>
                    { "Name": "eventUniqueValue", "FieldType": "Text", "MaxLength": 30, "IsRequired": false },<br>
                    { "Name": "campaignID", "FieldType": "Number", "IsRequired": false }<br>
                ],<br>
                SendableInfo: {<br>
                    Field: { "Name": "EmailAddress", "FieldType": "EmailAddress" },<br>
                    RelatesOn: "Subscriber Key"<br>
                },<br>
                CategoryID: 789144<br>
            };<br>
            <br>
            var de%%=v(@i)=%% = DataExtension.Add(deObj%%=v(@i)=%%);
    <br>
</p>    
   %%[ 
  next @i
else
  OutputLine("No records found in the data extension.")
endif
]%%
  
// copy result of ampscript. then place into ssjs
<script runat="server">
Platform.Load("core", "1");
   // put ampscript result here                            
</script>