diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..9306042
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,7 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "1.15.0",
+    "configurations": []
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c19184b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/debugging-workshop
+
+go 1.14
diff --git a/main.go b/main.go
index b37c814..712801b 100644
--- a/main.go
+++ b/main.go
@@ -82,10 +82,16 @@ func evaluateSignal(signal []int) string {
 		} else if i == maxDigit-1 {
 			break
 		} else {
-			result = evaluateNode(result, signal[i+1])
+			result = evaluateNode(signal[i], signal[i+1])
 		}
 	}
 
+	// if signal[maxDigit-1] == 1 && result != 1 {
+	// 	return fmt.Sprintf("someting's wrong good %d", result)
+	// } else if signal[maxDigit-1] == 0 && result != 0 {
+	// 	return fmt.Sprintf("someting's wrong bad %d", result)
+	// }
+
 	if result == 1 {
 		return "good"
 	} else {
@@ -95,9 +101,13 @@ func evaluateSignal(signal []int) string {
 
 func evaluateNode(node1, node2 int) int {
 	switch {
-	case node2 > node1:
+	// case node2 > node1:
+	// 	return 1
+	// case node2 < node1:
+	// 	return 0
+	case node2 == 1:
 		return 1
-	case node2 < node1:
+	case node2 == 0:
 		return 0
 	default:
 		return 0
diff --git a/main_test.go b/main_test.go
index 95db6fe..b8146cc 100644
--- a/main_test.go
+++ b/main_test.go
@@ -17,9 +17,9 @@ func Test_validateSignal(t *testing.T) {
 		{
 			name: "good signal",
 			args: args{
-				signal: []int{1, 0, 1, 0, 0, 1},
+				signal: []int{1, 1, 1, 1, 0, 0},
 			},
-			want: "good",
+			want: "bad",
 		},
 		{
 			name: "bad signal",