I need your help. I'm new to Flutter and I'm writting my first app. I would like to insert space beetween Objects (Images, but as long as I haven't designed them I use Placeholder) and center them.
Here are some screenshots, so you can imagine what I meen:

[![Screenshots](https://i.stack.imgur.com/aoZSE.jpg)](https://i.stack.imgur.com/aoZSE.jpg)

And here is my code (only body):

```
body:
        Container(
          child: Center(
           child: Column(
              children: <Widget> [
                 Row(
                  children: <Widget> [
                    Placeholder( 
                      color: Colors.deepOrange,
                      strokeWidth: 3.5,
                      fallbackWidth: 75.0,
                      fallbackHeight: 75.0,
                   ),

                   Placeholder( 
                      color: Colors.indigo,
                      strokeWidth: 3.5,
                      fallbackWidth: 75.0,
                      fallbackHeight: 75.0,
                    ),

                    Placeholder( 
                      color: Colors.pink[200],
                      strokeWidth: 3.5,
                      fallbackWidth: 75.0,
                      fallbackHeight: 75.0,
                    ),
                  ],
                   ),

                   Row(
                    children: <Widget> [
                      Placeholder( 
                       color: Colors.black,
                        strokeWidth: 3.5,
                       fallbackWidth: 75.0,
                       fallbackHeight: 75.0,
                    ),

                     Placeholder( 
                       color: Colors.blueGrey[300],
                       strokeWidth: 3.5,
                       fallbackWidth: 75.0,
                       fallbackHeight: 75.0,
                    ),

                   Placeholder( 
                      color: Colors.red,
                     strokeWidth: 3.5,
                     fallbackWidth: 75.0,
                     fallbackHeight: 75.0,
                    ),
                   ],
                  ),
                    Row(
                    children: <Widget> [
                      Placeholder( 
                       color: Colors.blueGrey[300],
                        strokeWidth: 3.5,
                       fallbackWidth: 225.0,
                       fallbackHeight: 75.0,
                    ),
                    ],
                    ),
                ],
              ),

         ),
     ),

```