svg
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 56 56" role="img" aria-label="Heartbeat"><title>Heartbeat</title><desc>Lub-dub pulse with a soft radial echo.</desc><style>.bg{fill:#ffffff;opacity:0.07;}.lit{fill:#ffffff;opacity:0;animation:icon-06-kf 1600ms cubic-bezier(0.25, 1, 0.5, 1) infinite both;}@keyframes icon-06-kf {0%{opacity:0.18;}6%{opacity:0.95;}14%{opacity:0.30;}22%{opacity:1;}34%{opacity:0.20;}70%{opacity:0.18;}100%{opacity:0.18;}}@media (prefers-reduced-motion: reduce){.lit{animation:none;opacity:0.45;}}.d00{animation-delay:68ms;}.d01{animation-delay:54ms;}.d02{animation-delay:48ms;}.d03{animation-delay:54ms;}.d04{animation-delay:68ms;}.d10{animation-delay:54ms;}.d11{animation-delay:34ms;}.d12{animation-delay:24ms;}.d13{animation-delay:34ms;}.d14{animation-delay:54ms;}.d20{animation-delay:48ms;}.d21{animation-delay:24ms;}.d22{animation-delay:0ms;}.d23{animation-delay:24ms;}.d24{animation-delay:48ms;}.d30{animation-delay:54ms;}.d31{animation-delay:34ms;}.d32{animation-delay:24ms;}.d33{animation-delay:34ms;}.d34{animation-delay:54ms;}.d40{animation-delay:68ms;}.d41{animation-delay:54ms;}.d42{animation-delay:48ms;}.d43{animation-delay:54ms;}.d44{animation-delay:68ms;}</style><circle class="bg" cx="6" cy="6" r="2.4"/><circle class="bg" cx="17" cy="6" r="2.4"/><circle class="bg" cx="28" cy="6" r="2.4"/><circle class="bg" cx="39" cy="6" r="2.4"/><circle class="bg" cx="50" cy="6" r="2.4"/><circle class="bg" cx="6" cy="17" r="2.4"/><circle class="bg" cx="17" cy="17" r="2.4"/><circle class="bg" cx="28" cy="17" r="2.4"/><circle class="bg" cx="39" cy="17" r="2.4"/><circle class="bg" cx="50" cy="17" r="2.4"/><circle class="bg" cx="6" cy="28" r="2.4"/><circle class="bg" cx="17" cy="28" r="2.4"/><circle class="bg" cx="28" cy="28" r="2.4"/><circle class="bg" cx="39" cy="28" r="2.4"/><circle class="bg" cx="50" cy="28" r="2.4"/><circle class="bg" cx="6" cy="39" r="2.4"/><circle class="bg" cx="17" cy="39" r="2.4"/><circle class="bg" cx="28" cy="39" r="2.4"/><circle class="bg" cx="39" cy="39" r="2.4"/><circle class="bg" cx="50" cy="39" r="2.4"/><circle class="bg" cx="6" cy="50" r="2.4"/><circle class="bg" cx="17" cy="50" r="2.4"/><circle class="bg" cx="28" cy="50" r="2.4"/><circle class="bg" cx="39" cy="50" r="2.4"/><circle class="bg" cx="50" cy="50" r="2.4"/><circle class="lit d00" cx="6" cy="6" r="3.1"/><circle class="lit d01" cx="17" cy="6" r="3.1"/><circle class="lit d02" cx="28" cy="6" r="3.1"/><circle class="lit d03" cx="39" cy="6" r="3.1"/><circle class="lit d04" cx="50" cy="6" r="3.1"/><circle class="lit d10" cx="6" cy="17" r="3.1"/><circle class="lit d11" cx="17" cy="17" r="3.1"/><circle class="lit d12" cx="28" cy="17" r="3.1"/><circle class="lit d13" cx="39" cy="17" r="3.1"/><circle class="lit d14" cx="50" cy="17" r="3.1"/><circle class="lit d20" cx="6" cy="28" r="3.1"/><circle class="lit d21" cx="17" cy="28" r="3.1"/><circle class="lit d22" cx="28" cy="28" r="3.1"/><circle class="lit d23" cx="39" cy="28" r="3.1"/><circle class="lit d24" cx="50" cy="28" r="3.1"/><circle class="lit d30" cx="6" cy="39" r="3.1"/><circle class="lit d31" cx="17" cy="39" r="3.1"/><circle class="lit d32" cx="28" cy="39" r="3.1"/><circle class="lit d33" cx="39" cy="39" r="3.1"/><circle class="lit d34" cx="50" cy="39" r="3.1"/><circle class="lit d40" cx="6" cy="50" r="3.1"/><circle class="lit d41" cx="17" cy="50" r="3.1"/><circle class="lit d42" cx="28" cy="50" r="3.1"/><circle class="lit d43" cx="39" cy="50" r="3.1"/><circle class="lit d44" cx="50" cy="50" r="3.1"/></svg>