first commit - found it not working

the dots just wobble back and forth one stop

script.js

@@ -0,0 +1,71 @@
+/*
+Duration: 52 seconds.0:52
+Hilbert curve at its sixth iteration
+
+    Alphabet : A, B
+    Constants : F + −
+    Axiom : A
+    Production rules:
+*/
+
+console.clear();
+
+const rules = {
+  "A": "+BF-AFA-FB+",
+  "B": "-AF+BFB+FA-",
+};
+
+let steps = 5;
+
+let s = "A";
+for(let i=0;i<steps;i++) {
+  let ns = "";
+  for(let c of s) {
+    ns += rules[c] || c;
+  }
+  s = ns;
+}
+
+let [x,y] = [0,0];
+const m = 2**(-steps);
+let dir = [m,0];
+let d = 'M 0 0 ';
+const width = 1.5 * 2**-(steps+1);
+
+const dots = [];
+
+for(let c of s) {
+  const [dx,dy] = dir;
+  switch(c) {
+    case '+':
+      dir = [-dy,dx];
+      break;
+    case '-':
+      dir = [dy,-dx];
+      break;
+    case 'F':
+      x += dx;
+      y += dy;
+      d += `l ${dx} ${dy}`;
+  }
+}
+
+const length = 2**steps - 1;
+
+document.getElementById('curve').setAttribute('stroke-width',width);
+document.getElementById('curve').setAttribute('d',d);
+document.getElementById('dots').setAttribute('stroke-width',width*0.4);
+document.getElementById('dots').setAttribute('d',d);
+document.getElementById('dots').setAttribute('stroke-dasharray',`0.0000001 ${2*m}`);
+
+function easeInOutSine(x) {
+return -(Math.cos(Math.PI * x) - 1) / 2;
+
+}
+function frame() {
+  const period = 1000;
+  const t = (new Date()-0)/period % 1000;
+  document.getElementById('dots').setAttribute('stroke-dashoffset',easeInOutSine(t)*m);
+  requestAnimationFrame(frame);
+}
+frame();