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redteam/slider.js

@@ -0,0 +1,18 @@
+const track = document.getElementById('track');
+const box   = document.getElementById('box');
+const slides = document.querySelectorAll('.slide');
+let idx = 0;
+
+function goTo(n){
+  idx = (n + slides.length) % slides.length;
+  track.style.transform = `translateX(-${idx * 100}%)`;
+
+  /* light blink */
+  box.classList.add('swap');
+  setTimeout(() => box.classList.remove('swap'), 250);
+}
+
+function move(d){ goTo(idx + d); }
+
+/* auto-advance every 3 s */
+setInterval(() => move(1), 3000);