how to make a dynamic form with formBuilder?

I want to create a dynamic checkbox and radio form in ionic – angular

[
{
“id”: 452,
“label”: sdf,
“toppings”: [
{
“id”: 452,
“label”: sdf,
“index”: 0
}
{
“id”: 452,
“label”: sdf,
“index”: 0
}
]
“type”: “checkbox”
},
{
“id”: 452,
“label”: sdf,
“toppings”: [
{
“id”: 452,
“label”: sdf,
“index”: 0
}
{
“id”: 452,
“label”: sdf,
“index”: 0
}
]
“type”: “radio”
}

]

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