Update break time and beep freq

metronom.ino

@@ -3,7 +3,7 @@ const uint BUZZER_PIN = 0;
 const uint BUTTON_LED_PIN = 5;
 const uint BUTTON_PIN = 6;
 
-const int BREAK_LENGTH = 300000;
+const int BREAK_LENGTH = 240000;
 const int BREAK_STEP = 2000;
 
 volatile int countdown = 0;
@@ -26,7 +26,7 @@ void loop() {
     digitalWrite(BUTTON_LED_PIN, LOW);
     delay(max(step-BREAK_STEP/2, 0));
   } else {
-    tone(BUZZER_PIN, 1000, 100);
+    tone(BUZZER_PIN, 300, 100);
     delay(1000);
   }
 }