fix: i forgot

main.js

@@ -23,9 +23,11 @@ for (let i = 0; i < slider.children.length; i++) {
     slider.style.setProperty("--x", state);
   });
 }
-
 rightBtn.addEventListener("click", function () {
+  prevDot.classList.remove("current");
   state = (state + 1) % slider.children.length;
+  dots.children[state].classList.add("current");
+  prevDot = dots.children[state];
   slider.style.setProperty("--x", state);
 });
 
@@ -35,5 +37,8 @@ leftBtn.addEventListener("click", function () {
   } else {
     state--;
   }
+  prevDot.classList.remove("current");
+  dots.children[state].classList.add("current");
+  prevDot = dots.children[state];
   slider.style.setProperty("--x", state);
 });