   pinMode(PIN_LED1, OUTPUT);
   pinMode(PIN_LED2, OUTPUT);
   pinMode(PIN_LED3, OUTPUT);
+  pinMode(13, OUTPUT);
+
+  digitalWrite(PIN_LED1, HIGH);
+  digitalWrite(PIN_LED2, HIGH);
+  digitalWrite(PIN_LED3, HIGH);
+  digitalWrite(13, HIGH);
 
   pinMode(PIN_PWM_L, INPUT);
   pinMode(PIN_PWM_R, INPUT);


  Serial.begin(115200);

  digitalWrite(PIN_LED1, HIGH);
}

void loop()

#define PIN_PWM_L A0
#define PIN_PWM_R A1
#define PIN_PWM_MODE A2
#define PIN_LED1 8
#define PIN_LED2 10
#define PIN_LED3 12
#define PWM_MID 1500
#define PWM_MID_DZ 100
