<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item>
    <shape  android:shape="oval">

    <solid  android:color="#FFFF0000"/>

    <size
        android:width="300dp"
        android:height="300dp"/>
    </shape>
  </item>
</selector>