slower LED blinking

arduino/src/main.cpp

@@ -7,8 +7,8 @@
 
 MPU9250 mpu;
 
-void toggleLed() {
-  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
+void blinkLed() {
+  digitalWrite(LED_BUILTIN, (millis()>>7) & 1);
 }
 
 void setup() {
@@ -70,7 +70,7 @@ void loop() {
     );
     Serial.write(outputBuffer);
 
-    toggleLed();
+    blinkLed();
 
   }