fix green pixel showing wrongly on startup

src/Clock.cpp

@@ -10,9 +10,8 @@ Clock::Clock() : strip(NUMPIXELS, D5, NEO_GRB + NEO_KHZ800), animator(), refresh
 
 void Clock::init() {
   strip.begin();
-  strip.clear();
-  strip.show();
 
+  // initialize clock ticker
   turnOn();
 }
 

src/Clock.h

@@ -25,8 +25,20 @@ class Clock {
 
  public:
   Clock();
+
+  /**
+   * initialize the strip and wordclock functions
+   */
   void init();
+
+  /**
+   * turn of the wordclock
+   */
   void turnOff();
+
+  /**
+   * turn on the wordclock
+   */
   void turnOn();
 
   Ticker refreshTicker;