How to create next level of flow chart in d3js
<p>I have created a basic flow chart but I am not getting that how to create next level of flow chart.
I am attaching the image and the jsfiddle link.</p>

<p><a href="https://jsfiddle.net/2ptpff55/" rel="nofollow noreferrer">Fiddle</a></p>

<p><a href="https://i.stack.imgur.com/8SH36.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8SH36.png" alt="enter image description here"></a></p>

<p>here is the data</p>

<pre><code> "process":[
            { 
            "ProcessName" : "nivprocess.exe", 
            "Username" : "Joh Doe", 
            "Created" : "10:00:00", 
            "processDescription" : null, 
            "process_parent" : null, 
            "operation" : [
                {
                "operationDescription":"OP1",
                "operationTime":"10:15:15",
                "response":"Fail" 
                },{
                "operationDescription":"OP2",
                "operationTime":"10:20:00",
                "response":"Success" 
                }
                ], 
            },
            { 
            "ProcessName" : "Process2.exe", 
            "Username" : "Some One", 
            "Created" : "11:00:00", 
            "processDescription" : null, 
            "process_parent" : "process1", 
            "operation" : [
                {
                "operationDescription":"OP1",
                "operationTime":"10:15:15",
                "response":"Fail" 
                },{
                "operationDescription":"OP2",
                "operationTime":"10:20:00",
                "response":"Success" 
                }], 
            },
            { 
            "ProcessName" : "Process3.exe", 
            "Username" : "Nika Boka", 
            "Created" : "12:00:00", 
            "processDescription" : null, 
            "process_parent" : "process2", 
            "operation" : [
                {
                "operationDescription":"OP1",
                "operationTime":"10:15:15",
                "response":"Fail" 
                },{
                "operationDescription":"OP2",
                "operationTime":"10:20:00",
                "response":"Success" 
                }], 
            }
        ]}
</code></pre>