public/rule.svg
<svg xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 24 24" height="24px" viewBox="0 0 24 24" width="24px" fill="#000000"><g><rect fill="none" height="24" width="24"/><path d="M16.54,11L13,7.46l1.41-1.41l2.12,2.12l4.24-4.24l1.41,1.41L16.54,11z M11,7H2v2h9V7z M21,13.41L19.59,12L17,14.59 L14.41,12L13,13.41L15.59,16L13,18.59L14.41,20L17,17.41L19.59,20L21,18.59L18.41,16L21,13.41z M11,15H2v2h9V15z"/></g></svg>