diff --git a/src/SevenSegmentClock.cpp b/src/SevenSegmentClock.cpp
index 6e80a95..055529d 100644
--- a/src/SevenSegmentClock.cpp
+++ b/src/SevenSegmentClock.cpp
@@ -172,39 +172,104 @@ void SevenSegmentClock::displaySeperator(char seperatorCharacter) {
       strip->setPixelColor(clockSeperatorLed2, currentColor);
       break;
     default:
+      Serial.print("SevenSegmentClock::displaySeperator: Unknown character to be displayed: ");
+      Serial.println(seperatorCharacter);
+    case ' ':
+    case 0:
       strip->setPixelColor(decimalPointLed, black);
       strip->setPixelColor(clockSeperatorLed1, black);
       strip->setPixelColor(clockSeperatorLed2, black);
-      Serial.print("SevenSegmentClock::displaySeperator: Unknown character to be displayed: ");
-      Serial.println(seperatorCharacter);
       break;
   }
 }
 
-static uint32_t lastUpdate_ms = 0;
 
 void SevenSegmentClock::displayTime(int hour, int minute)  {
+  clockHour = hour;
+  clockMinute = minute;
+  Serial.print("SevenSegmentClock: new time ");
+  Serial.print(clockHour); Serial.print(":"); Serial.println(clockMinute);
+  displayUpdate();
+};
+
+void SevenSegmentClock::displayUpdate(void) {
   char displayText[4];
-  
-  if (clockHour != hour || clockMinute != minute || millis()-lastUpdate_ms > TIME_BETWEEN_DISPLAY_UPDATES_ms) {
-    clockHour = hour;
-    clockMinute = minute;
-    Serial.print("SevenSegmentClock: new time "); Serial.print(clockHour); Serial.print(":"); Serial.println(clockMinute);
+  static int lastHour=0, lastMinute=0;
+  static uint32_t lastUpdate_ms = 0;
+  static uint32_t nextBlinkSwitch_ms = 0;
+  static boolean currentlyBlinkOn = false;
+
+  if (clockHour != lastHour || clockMinute != lastMinute || millis()-lastUpdate_ms > TIME_BETWEEN_DISPLAY_UPDATES_ms) {
+    lastHour = clockHour;
+    lastMinute = clockMinute;
     displayText[0] = (hour > 9) ? '0' + (hour/10) : ' ';
     displayText[1] = '0' + hour % 10;
     displayText[2] = '0' + minute / 10;
     displayText[3] = '0' + minute % 10;
-    displayDigit(0, displayText[0]);
-    displayDigit(1, displayText[1]);
-    displayDigit(2, displayText[2]);
-    displayDigit(3, displayText[3]);
-    displaySeperator(':');
+    switch (blinkMode) {
+      case NoBlinking:
+        displayDigit(0, displayText[0]);
+        displayDigit(1, displayText[1]);
+        displayDigit(2, displayText[2]);
+        displayDigit(3, displayText[3]);
+        displaySeperator(':');
+        break;
+      case ClockBlinking:
+        if (currentlyBlinkOn) {
+          displayDigit(0, displayText[0]);
+          displayDigit(1, displayText[1]);
+          displayDigit(2, displayText[2]);
+          displayDigit(3, displayText[3]);
+          displaySeperator(':');
+        } else {
+          displayDigit(0, ' ');
+          displayDigit(1, ' ');
+          displayDigit(2, ' ');
+          displayDigit(3, ' ');
+          displaySeperator(' ');
+        }
+        if (millis() > nextBlinkSwitch_ms) {
+          currentlyBlinkOn = !currentlyBlinkOn;
+          nextBlinkSwitch_ms = millis() + (currentlyBlinkOn ? BLINK_ON_TIME_ms : BLINK_OFF_TIME_ms);
+        }
+        break;
+      case SeperatorBlinking:
+        displayDigit(0, displayText[0]);
+        displayDigit(1, displayText[1]);
+        displayDigit(2, displayText[2]);
+        displayDigit(3, displayText[3]);
+        if (currentlyBlinkOn) {
+          displaySeperator(':');
+        } else {
+          displaySeperator(' ');
+        }
+        if (millis() > nextBlinkSwitch_ms) {
+          currentlyBlinkOn = !currentlyBlinkOn;
+          nextBlinkSwitch_ms = millis() + (currentlyBlinkOn ? BLINK_ON_TIME_ms : BLINK_OFF_TIME_ms);
+        }
+        break;
+      case DecimalPointBlinking:
+        displayDigit(0, displayText[0]);
+        displayDigit(1, displayText[1]);
+        displayDigit(2, displayText[2]);
+        displayDigit(3, displayText[3]);
+        if (currentlyBlinkOn) {
+          displaySeperator('.');
+        } else {
+          displaySeperator(' ');
+        }
+        if (millis() > nextBlinkSwitch_ms) {
+          currentlyBlinkOn = !currentlyBlinkOn;
+          nextBlinkSwitch_ms = millis() + (currentlyBlinkOn ? BLINK_ON_TIME_ms : BLINK_OFF_TIME_ms);
+        }
+        break;
+    }
     strip->show();
     Serial.print("Shown: "); Serial.print(displayText[0]); Serial.print(displayText[1]);
     Serial.print(':'); Serial.print(displayText[2]); Serial.println(displayText[3]);
     lastUpdate_ms = millis();
   }
-};
+}
 
 uint32_t SevenSegmentClock::red, SevenSegmentClock::green, SevenSegmentClock::blue, SevenSegmentClock::white, SevenSegmentClock::black;
 uint8_t SevenSegmentClock::LedDataPin;
diff --git a/src/SevenSegmentClock.h b/src/SevenSegmentClock.h
index 500c08d..9d7b8dd 100644
--- a/src/SevenSegmentClock.h
+++ b/src/SevenSegmentClock.h
@@ -5,7 +5,8 @@
 
 // avoid flickering of the display:
 #define TIME_BETWEEN_DISPLAY_UPDATES_ms 300
-#define BLINK_ON_OFF_TIME_ms 1000
+#define BLINK_OFF_TIME_ms 600
+#define BLINK_ON_TIME_ms 400
 #define defaultLedDataPin 2
 class SevenSegmentClock {
 public:
@@ -13,7 +14,10 @@ public:
   SevenSegmentClock(uint8_t dataPin) { LedDataPin=dataPin; init(); };
   void begin(void);
   void displayTime(int hour, int minute);
+  void displayUpdate(void);
   //void setClockSpeed(int _msPerModelSecond) { msPerModelSecond = _msPerModelSecond; setClockSpeed("x"); };
+  enum BlinkMode { NoBlinking, ClockBlinking, SeperatorBlinking, DecimalPointBlinking };
+  void setBlinkMode(BlinkMode _blinkMode) { blinkMode = _blinkMode; };
   void setClockHalted(bool halted) { clockHalted = halted; };
   static uint32_t red, green, blue, white, black;
   enum ClockDisplayStatus { Off, Booting, Halted, StandardClock, FastClock };
@@ -23,6 +27,7 @@ private:
   void init(void) { displayStatus = Off; clockHour=12; clockMinute=34; setClockHalted(true); };
   static uint8_t LedDataPin;
   static Adafruit_NeoPixel *strip;
+  static BlinkMode blinkMode;
   ClockDisplayStatus displayStatus;
   int clockHour;
   int clockMinute;
diff --git a/src/main.cpp b/src/main.cpp
index c48a855..a380b4a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -181,11 +181,17 @@ void setup() {
 }
 
 int hours = 0, minutes = 0;
+uint32_t nextUpdate_ms = 0;
 
 void loop() {
-  sevenSegmentClock.displayTime(hours, minutes++);
-  if (minutes > 99) { minutes = 0; }
-  if (minutes % 5 == 0) hours++;
-  if (hours > 99) hours = 0;
-  delay(1000);
+  if (millis() > nextUpdate_ms) {
+    nextUpdate_ms = millis() + 1000;
+    minutes++;
+    if (minutes > 99) { minutes = 0; }
+    if (minutes % 5 == 0) hours++;
+    if (hours > 99) hours = 0;
+    sevenSegmentClock.displayTime(hours, minutes);
+    if (hours % 4 == 0) sevenSegmentClock.setBlinkMode(SeperatorBlinking); else sevenSegmentClock.setBlinkMode(NoBlinking);
+  }
+  sevenSegmentClock.displayUpdate();
 }