<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 18 18">
    <path d="M0 0h18v18h-18z" fill="none"/>
    <path d="M4.5 11h-1.5v4h4v-1.5h-2.5v-2.5zm-1.5-4h1.5v-2.5h2.5v-1.5h-4v4zm10.5 6.5h-2.5v1.5h4v-4h-1.5v2.5zm-2.5-10.5v1.5h2.5v2.5h1.5v-4h-4z"/>
</svg>