Question How to create asset bundle? Please, I'm lost :(

In an Custom Editor Window I made, I assign 2 Sprites:

Code (CSharp):

1. Sprite spriteA = (Sprtie)EditorGUILayout.ObjectField("spriteA", spriteA, typeof(Sprite), allowSceneObjects: true);
2. Sprite spriteB= (Sprtie)EditorGUILayout.ObjectField("spriteB", spriteB, typeof(Sprite), allowSceneObjects: true);
3.  

now I want to store them in a new Assets Bundle I want to create in code (not manually).
How can I do it?

 

https://learn.unity.com/tutorial/introduction-to-asset-bundles#6028bab6edbc2a750bf5b8a7
or
https://docs.unity.cn/2021.1/Documentation/Manual/BuildingAssetBundles4x.html