diff --git a/TD3/js/td3-exo1.js b/TD3/js/td3-exo1.js
index f1ab6f1..1e74a61 100644
--- a/TD3/js/td3-exo1.js
+++ b/TD3/js/td3-exo1.js
@@ -16,11 +16,14 @@ function selection(event) {
     var maCase = event.currentTarget;
     var vide = document.body.querySelector(".case.vide");
 
-    if ((maCase.offsetTop == vide.offsetTop && Math.abs(maCase.offsetLeft - vide.offsetLeft == 102)) ||
-        (maCase.offsetLeft == vide.offsetLeft && Math.abs(maCase.offsetTop - vide.offsetTop == 102))) {
-        console.log("1");
+    if ((maCase.offsetTop == vide.offsetTop && Math.abs(maCase.offsetLeft - vide.offsetLeft) == 102) ||
+        (maCase.offsetLeft == vide.offsetLeft && Math.abs(maCase.offsetTop - vide.offsetTop) == 102)) {
+        console.log("ok");
         maCase.className = "case vide";
+        var buff = maCase.innerHTML;
+        maCase.innerHTML = "";
         vide.className = "case";
+        vide.innerHTML = buff;
     }
 
     console.log(event.currentTarget.className + " : " + event.currentTarget.innerText);