how to make the sprite and the background color in a tile disappear?

hi everyone, i am a newbie to the c sharp codes. i recently want to create a 2048 shape shifting puzzle but the only difference is the tile is on a various shape that combine to the same shape like 2048 puzzle. i followed the tutorial on how to make the actual 2048 puzzle and that is the number puzzle. i already make the tiles script that contain the properties of the tiles that i have been set in the inspector. i also want to know can the swith statement apply for the sprites?. Can you guys give me the codes on how to do this.