<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M0 0v24h6.75V6.75h8.625V0H0zm8.625 8.625V24h6.75V8.625h-6.75zM17.25 0v24H24V0h-6.75z"/></svg>