Hierarchical ScaNN tree

<div class="v"><header><b>ScaNN TREE</b><span id="state"></span></header><main><div class="levels" id="levels"></div><div class="count" id="count"></div></main><footer>coarse → fine candidates</footer></div>

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let n=0;function draw(){document.getElementById("levels").innerHTML=[2,4,6,8].map((c,i)=>"<div class=level>"+Array.from({length:c},(_,j)=>"<i class=\""+(i<=n&&j===Math.floor(c/2)?"on":"")+"\"></i>").join("")+"</div>"+(i<3?"<span class=arrow>→</span>":"")).join("");document.getElementById("count").textContent=["coarse cluster","subcluster","leaf group","vector candidates"][n];document.getElementById("state").textContent="level "+(n+1)+" / 4";n=(n+1)%4}draw();setInterval(draw,900)