<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><circle cx="12" cy="12" r="0" fill="currentColor"><animate attributeName="r" calcMode="spline" dur="1.2s" keySplines=".52,.6,.25,.99" repeatCount="indefinite" values="0;11"/><animate attributeName="opacity" calcMode="spline" dur="1.2s" keySplines=".52,.6,.25,.99" repeatCount="indefinite" values="1;0"/></circle></svg>