Loop in Widget for show my list

I would to do a loop for see below with ---------->here
if it possible? if yes how can ì do? my loop for dont work :wink: else how can i do for see my decoded list
Thank you again for your help

class _MyHomePageState extends State {

Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: Text(widget.title),
body: Center(
child: Column(
children: [
----------->Here for(int param:0; param < decoded.lenght; param++) {
(decoded == null) ? EmptyWidget() : NewWidget(param: param),