If I draw graphics like this, I get exactly what I need:

```
Graphics[{{Blue, Disk[{0, 0}, 10, {0, Pi/2}]}, {Red, 
   Disk[{0, 0}, 3, {0, Pi/4}]}}]

```

![enter image description here](https://i.stack.imgur.com/GAtsU.png)

But I need to accomplish this task with `Overlay[]`. Here's the code:

```
graphics1 = Graphics[{Red, Disk[{0, 0}, 3, {0, Pi/4}]}];  
graphics2 = Graphics[{Blue, Disk[{0, 0}, 10, {0, Pi/2}]}];  
Overlay[{graphics2, graphics1}]

```

And I get this as output:  

![enter image description here](https://i.stack.imgur.com/allsb.png)

How can I position these graphics according to coordinates?  

Thank you for any suggestions or answers.