Effect Event

<div class="scene"><div class="connection"><span class="lamp"></span> ROOM CONNECTED <b id="connections">1 connection</b></div><div class="theme">theme <span id="theme">mint</span></div><div class="toast" id="toast">Connected with mint theme</div><div class="label">theme changes; connection count stays 1</div></div>

.scene{width:min(94vw,800px);height:min(86vh,320px);position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:clamp(9px,2.4vmin,20px);font:500 clamp(15px,4vmin,18px)/1.3 var(--font-sans,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif)}.scene b,.scene strong{font-weight:700}.label{color:var(--muted)}.code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.pill{border:1px solid var(--line);border-radius:8px;padding:.4em .65em;background:var(--bg)}.active{border-color:var(--accent)!important;color:var(--accent)!important;background:color-mix(in srgb,var(--accent) 10%,var(--surface))!important}.connection{display:flex;align-items:center;gap:6px;border:1px solid var(--accent);border-radius:8px;padding:.55em;font:600 clamp(12px,3vmin,15px) ui-monospace,monospace}.connection b{margin-left:auto}.lamp{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 20%,transparent)}.theme{margin:clamp(16px,7vmin,45px) auto;text-align:center}.theme span{border:1px solid var(--line);padding:.5em;border-radius:6px}.toast{background:var(--accent);color:var(--bg);padding:.5em;border-radius:7px;text-align:center;transition:background .3s}.label{text-align:center;margin-top:10px;font-size:.85em}

const colors=["mint","amber","blue"];let n=0;function tick(){const i=n%3;document.getElementById("theme").textContent=colors[i];document.getElementById("toast").textContent="Connected with "+colors[i]+" theme";document.getElementById("toast").style.background=["var(--accent)","var(--accent-3)","var(--accent-2)"][i];n++}tick();setInterval(tick,950)