disappear homepage pics

static/app.js

@@ -25,18 +25,23 @@ document.addEventListener('DOMContentLoaded', function () {
   
     function checkScroll() {
       const triggerBottom = window.innerHeight * 0.8;
+      const triggerTop = window.innerHeight * 0.2;
   
       imageBoxes.forEach((box, index) => {
         const boxTop = box.getBoundingClientRect().top;
   
-        if (boxTop < triggerBottom) {
+        if (boxTop < triggerBottom && boxTop > triggerTop) {
           setTimeout(() => {
             box.classList.add('show');
           }, index * 200); // Delay each image by 200ms
+        } else {
+          box.classList.remove('show');
         }
       });
     }
   
     window.addEventListener('scroll', checkScroll);
+    checkScroll(); // Check on load
   });
+  
   
\ No newline at end of file