diff --git a/projects/landing-page/js/app.js b/projects/landing-page/js/app.js
index f52ee8672..6e820d7b9 100755
--- a/projects/landing-page/js/app.js
+++ b/projects/landing-page/js/app.js
@@ -58,5 +58,129 @@
 // Scroll to section on link click
 
 // Set sections as active
-
+const viewPortWidth=window.innerWidth || document.documentElement.clientWidth;
+const viewPortHight=window.innerHeight|| document.documentElement.clientHeight;
+
+
+
+const lotsElement=document.querySelectorAll(".navList")
+const element1=lotsElement[0]
+element1.addEventListener("mouseover",function(){
+    element1.style.backgroundColor="rgb(1,7,12)"
+})
+element1.addEventListener("mouseout",function(){
+    element1.style.backgroundColor="rgb(4, 24, 42)"
+})
+const element2=lotsElement[1]
+element2.addEventListener("mouseover",function(){
+    element2.style.backgroundColor="rgb(1,7,12)"
+})
+element2.addEventListener("mouseout",function(){
+    element2.style.backgroundColor="rgb(4, 24, 42)"
+})
+const element3=lotsElement[2]
+element3.addEventListener("mouseover",function(){
+    element3.style.backgroundColor="rgb(1,7,12)"
+})
+element3.addEventListener("mouseout",function(){
+    element3.style.backgroundColor="rgb(4, 24, 42)"
+})
+const element4=lotsElement[3]
+element4.addEventListener("mouseover",function(){
+    element4.style.backgroundColor="rgb(1,7,12)"
+})
+element4.addEventListener("mouseout",function(){
+    element4.style.backgroundColor="rgb(4, 24, 42)"
+})
+
+
+
+const ourFunction=function(object){
+    const rect=object.getBoundingClientRect();
+    if(
+        rect.left>=0 &&
+        rect.bottom<=viewPortHight&&
+        rect.top>=0 &&
+        rect.right<=viewPortWidth
+    ) {
+        object.style.backgroundColor="rgb(5, 53, 95)"
+
+    }
+    else(console.log("else"))
+
+}
+const sectionsAll=document.querySelectorAll(".section")
+const section1=sectionsAll[0]
+document.addEventListener("scroll",function(){
+    const rect=section1.getBoundingClientRect();
+    if(
+        rect.left>=0 &&
+        rect.bottom<=viewPortHight&&
+        rect.top>=0 &&
+        rect.bottom>0&&
+        rect.right<=viewPortWidth
+    ) {
+        section1.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:xx-large;margin-bottom:400px")
+        
+    }
+    else(
+        section1.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:large;margin-bottom:400px")
+    )
+    
+
+})
+const section2=sectionsAll[1]
+document.addEventListener("scroll",function(){
+    const rect=section2.getBoundingClientRect();
+    if(
+        rect.left>=0 &&
+        rect.bottom<=viewPortHight&&
+        rect.top>=0 &&
+        rect.bottom>0&&
+        rect.right<=viewPortWidth
+
+    ) {
+        section2.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:xx-large;margin-bottom:400px")
+        
+    }
+    else(
+        section2.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:large;margin-bottom:400px")
+    )
+})
+const section3=sectionsAll[2]
+document.addEventListener("scroll",function(){
+    const rect=section3.getBoundingClientRect();
+    if(
+        rect.left>=0 &&
+        rect.bottom<=viewPortHight&&
+        rect.bottom>0&&
+        rect.top>=0&&
+        rect.right<=viewPortWidth
+    ) {
+        section3.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:xx-large;margin-bottom:400px")
+        
+    }
+    else(
+        section3.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:large;margin-bottom:400px")
+    )
+})
+const section4=sectionsAll[3]
+section4.style.height=viewPortHight
+document.addEventListener("scroll",function(){
+    const rect=section4.getBoundingClientRect();
+    if(
+        rect.left>=0 &&
+        rect.bottom<=viewPortHight&&
+        rect.top>=0 &&
+        rect.right<=viewPortWidth&&
+        rect.bottom>0
+    ) {
+        section4.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:xx-large;margin-bottom:400px")
+        
+    }
+    else(
+        section4.style.cssText=("background-image:url(moresimple.jpg);color:white;font-size:large;margin-bottom:400px")
+    )
+
+})