diff --git a/ISN/P5js/lib/sketch.js b/ISN/P5js/lib/sketch.js
index 14358c1..b5ac089 100644
--- a/ISN/P5js/lib/sketch.js
+++ b/ISN/P5js/lib/sketch.js
@@ -114,7 +114,7 @@ var myp5 = new p5(circleBall, 'c4');
 var myp5 = new p5(circleBall, 'c4bis');
 
 var waveBall = function (p) {
-    var x = 25;
+    var x = 50;
     var y = 25;
     var ballRadius = 20;
     var t = 0;
@@ -127,7 +127,7 @@ var waveBall = function (p) {
         p.background(white);
         p.fill(black);
         t += speed;
-        x = p.cos(t) * pathRadius + 50;
+        y = p.cos(t) * pathRadius + 50;
         p.ellipse(x, y, ballRadius, ballRadius);
     }
 };