diff --git a/DEV2.1/TP03/Test.class b/DEV2.1/TP03/Test.class
index 8bbac2e..d479188 100644
Binary files a/DEV2.1/TP03/Test.class and b/DEV2.1/TP03/Test.class differ
diff --git a/DEV2.1/TP03/Test.java b/DEV2.1/TP03/Test.java
index 0cd9dbd..98de2ef 100644
--- a/DEV2.1/TP03/Test.java
+++ b/DEV2.1/TP03/Test.java
@@ -13,16 +13,24 @@ public class Test {
 		GridLayout layout = new GridLayout(a,a);
 		fenetre.setLayout(layout);
 
-		for(int i = 0; i < a*a; i++) {
-			JPanel panneau = new JPanel();
-			if (i%2 == 0) {
-				panneau.setBackground(Color.WHITE);
-			}
-			else {
-				panneau.setBackground(Color.CYAN);
-			}
-			fenetre.add(panneau);
-		} 
+		Color color_1 = Color.WHITE;
+		Color color_2 = Color.CYAN;
+
+		for (int j = 0; j < a; j++) {
+			Color temp = color_1;
+			color_1 = color_2;
+			color_2 = temp;
+			for(int i = 0; i < a; i++) {
+				JPanel panneau = new JPanel();
+				if (i%2 == 0) {
+					panneau.setBackground(color_1);
+				}
+				else {
+					panneau.setBackground(color_2);
+				}
+				fenetre.add(panneau);
+			} 
+		}