<!-- License: Apache. Made by Iconscout: https://github.com/Iconscout/unicons -->
<svg fill="#000000" width="800px" height="800px" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M21,2H3A1,1,0,0,0,2,3V21a1,1,0,0,0,1,1H21a1,1,0,0,0,1-1V3A1,1,0,0,0,21,2ZM20,20H4V4H20Z"/></svg>