Theta icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" fill-rule="evenodd" d="M16.285 4.717h-8.57v14.57h8.57zm-9.428 0v14.57l.857.858h8.572l.857-.857V4.717l-.858-.858h-8.57z" clip-rule="evenodd"/><path fill="currentColor" d="M11.572 9.857H9.429v.857h5.143v-.857h-2.143V7.286h-.857zm0 4.286H9.429v-.857h5.143v.857h-2.143v2.571h-.857z"/></svg>