svg
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 56 56" role="img" aria-label="Halt"><title>Halt</title><desc>A 3×3 square opens, then collapses to a single center dot. One-shot.</desc><style>.bg{fill:#ffffff;opacity:0.07;}.lit{fill:#ffffff;opacity:0;animation:icon-39-kf 1600ms cubic-bezier(0.65, 0, 0.35, 1) 1 both;}@keyframes icon-39-kf {0%{opacity:0.08;}14%{opacity:1;}72%{opacity:0.95;}100%{opacity:0.08;}}@media (prefers-reduced-motion: reduce){.lit{animation:none;opacity:0.45;}}.d11{animation-delay:0ms;}.d12{animation-delay:0ms;}.d13{animation-delay:0ms;}.d21{animation-delay:0ms;}.d22{animation-delay:800ms;}.d23{animation-delay:0ms;}.d31{animation-delay:0ms;}.d32{animation-delay:0ms;}.d33{animation-delay:0ms;}</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 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 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 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"/></svg>