diff --git a/index.html b/index.html
index df8964a..4319375 100644
--- a/index.html
+++ b/index.html
@@ -70,10 +70,20 @@
             let zeme_img = document.querySelector(".earth-fixed");
             console.log("zjeveni: " + (zjeveni_rect.height - zjeveni_rect.top));
             if (zjeveni_rect.height - zjeveni_rect.top > 0) {
-                let opacity = (zjeveni_rect.top / zjeveni_rect.height);
+                let opacity = 1 - (zjeveni_rect.top / zjeveni_rect.height);
                 console.log("zjeveni opacity: " + opacity)
                 zeme_img.style.opacity = opacity;
             }
+            let rotace = document.querySelector('#rotace');
+            let rotace_rect = rotace.getBoundingClientRect();
+            console.log("rotace: " + (rotace_rect.height - rotace_rect.top));
+            if (rotace_rect.height - rotace_rect.top > 0) {
+                let cislo = Math.ceil(13 * (1 - (rotace_rect.top / rotace_rect.height)));
+                console.log("cislo: " + cislo);
+                if (cislo >= 1 && cislo <= 13) {
+                    zeme_img.setAttribute("src", "img/img/e" + cislo + ".jpg");
+                }
+            }
         }
 
         //cisla v konzoli