diff --git a/index.html b/index.html
index 402a734..93be1bb 100644
--- a/index.html
+++ b/index.html
@@ -251,7 +251,7 @@
                 var data = JSON.parse(event.data);
 
                 if (data.error) {
-                    displayMessage("Error: " + data.error);
+                    displayMessage("Error: " + data.error + (data.stderr? "\n" + data.stderr : ""));
                 } else {
                     displayMessage(data.message);
                     if (data.stdout) {
diff --git a/server/sketch/sketch.ino b/server/sketch/sketch.ino
index 6948dbc..6d11189 100644
--- a/server/sketch/sketch.ino
+++ b/server/sketch/sketch.ino
@@ -28,9 +28,9 @@ void setup() {
 // the loop function runs over and over again forever
 void loop() {
   digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
-  Serial.println("LED HIGH");
+  Serial.println("LED HIGH")
   delay(1000);                       // wait for a second
   digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
-  Serial.println("LED LOW")
+  Serial.println("LED LOW");
   delay(1000);                       // wait for a second
 }