diff --git a/sketches/pendulum/pendulum.c b/sketches/pendulum/pendulum.c
index d4f6647..66de750 100644
--- a/sketches/pendulum/pendulum.c
+++ b/sketches/pendulum/pendulum.c
@@ -14,7 +14,7 @@
 #define HUE_DIF (HUE_MAX - HUE_MIN)
 #define HUE_SAT 100	// 0 = white, 100 = color
 #define HUE_VAL 20	// 0 = black, 100 = color
-#define HUE_STEP 8	// 8
+#define HUE_STEP 8	// Bis 3 sollte gehen
 const uint32_t colorSteps = HUE_DIF / HUE_STEP;
 //~ const uint32_t colorSteps = 5;
 
@@ -24,6 +24,7 @@ const uint32_t colorSteps = HUE_DIF / HUE_STEP;
 void writeZero(void);
 void writeOne(void);
 void writeRGB(uint8_t red, uint8_t green, uint8_t blue);
+void nextColor(hsv_t* hsvList, rgb_t* rgbList, hsv_t start, hsv_t end);
 
 // Interrupt variables:
 int8_t volatile status = 1;
@@ -32,28 +33,36 @@ uint16_t volatile max = HUE_MID;
 uint32_t volatile time = 0;
 uint32_t volatile T_half = 0;
 uint32_t volatile oldTime = 0;
-uint32_t volatile cooldown = 14000000;
+uint32_t volatile cooldown = 3000000;	// * 50 ns = 150 ms disabled interrupt
+uint8_t volatile triggered = 0;
 //~ uint32_t volatile delay = 0;
 
 // On External Interrupt:
 ISR(INT1_vect) {
-	EIMSK &= 0xfd;	// Disable INT1
-	PORTC &= 0xef;	// Turn LED off while INT1 disabled
-	//~ uint64_t time2 = TCNT2;
-	//~ uint64_t time1 = TCNT1;
-	//~ uint64_t time0 = TCNT0;
-	//~ T_half = time2 | (time1 << 9) | (time0 << 26);
-	T_half = time + TCNT1;
-	//~ delay = T_half / 16;	//Delay for the next possible external interrupt
-	//~ cooldown = T_half / 2;
-	TCNT2 = 0;		// Reset Timer/Counter2
-	TCNT1 = 0;		// Reset Timer/Counter1
-	TCNT0 = 0;		// Reset Timer/Counter0
-	time = 0;
-	oldTime = 0;
-	PORTC ^= 0x02;
-	//~ min = HUE_MID;
-	//~ max = HUE_MID;
+	uint32_t now = time + TCNT1;
+	//~ triggered = (triggered + 1) % 4;
+	if(now > cooldown) {
+		triggered = true;
+		//~ EIMSK &= 0xfd;	// Disable INT1
+		//~ EICRA &= 0xf3;	// 
+		PORTC &= 0xef;	// Turn LED off while INT1 disabled (PORTC3 = PIN26)
+		PORTC ^= 0x02;	// toggle LED on INT1 rising edge (PORTC1 = PIN24)
+		//~ uint64_t time2 = TCNT2;
+		//~ uint64_t time1 = TCNT1;
+		//~ uint64_t time0 = TCNT0;
+		//~ T_half = time2 | (time1 << 9) | (time0 << 26);
+		T_half = now;
+		//~ delay = T_half / 16;	// Delay for the next possible external interrupt
+		cooldown = T_half / 2;
+		//~ TCNT2 = 0;		// Reset Timer/Counter2
+		//~ TCNT1 = 0;		// Reset Timer/Counter1
+		TCNT0 = 0;		// Reset Timer/Counter0
+		time = 0;
+		oldTime = 0; 	
+	}
+	//~ triggered = 0;
+	min = HUE_MID;
+	max = HUE_MID;
 	//~ status = (status == 1 ? -1 : 1);
 }
 
@@ -67,7 +76,7 @@ int main(void) {
 	EIMSK |= 0x02;	// External Interrupt Mask Register
 					// Enable INT1 (PIN5) for interrupt
 	EICRA |= 0x0c;	// External Interrupt Control Register
-					// INT1 on rising edge
+					// INT1 on falling edge
 	
 	TIMSK1 |= 0x01;	// Timer/Counter1 Interrupt Mask Register
 					// Enable overflow interrupt
@@ -125,7 +134,7 @@ int main(void) {
 	}
 	
 	// Next color
-	int8_t sign = 1;
+	int8_t sign = -1;
 	min += sign * HUE_STEP;
 	max -= sign * HUE_STEP;
 	interpolate(
@@ -150,18 +159,19 @@ int main(void) {
 		//~ }
 		
 		if(now > cooldown) {
-			EIMSK |= 0x02;	// Enable INT1
-			PORTC |= 0x10;	// Turn on LED while INT1 enabled
+			//~ EIMSK |= 0x02;	// Enable INT1
+			PORTC |= 0x10;	// Turn on LED while INT1 enabled (PORTC3 = PIN26)
 		}
 		
 		uint32_t T_step = T_half / colorSteps;
 		
 		// Check if it is time for next color
-		if(now > oldTime + T_step) {
+		if(now > oldTime) {	// + T_step || (now < T_step && oldTime == 0)) {
 			oldTime += T_step;
-			PORTC ^= 0x04;
+			PORTC ^= 0x04;	// toggle LED when writing new color (PORTC2 = PIN25)
 			// Assign color
 			//~ EIMSK &= 0xfd;	//~ cli();
+			nextColor(  colorsHSV, colorsRGB, init_hsv_t(min, HUE_SAT, HUE_VAL), init_hsv_t(max, HUE_SAT, HUE_VAL));
 			for(int i = 0; i < LEDS; i++) {
 				writeRGB( colorsRGB[i].r, colorsRGB[i].g, colorsRGB[i].b);
 			}
@@ -171,13 +181,14 @@ int main(void) {
 			// Next color
 			min += sign * HUE_STEP;
 			max -= sign * HUE_STEP;
-			interpolate(
-				init_hsv_t(min, HUE_SAT, HUE_VAL),	// from color
-				init_hsv_t(max, HUE_SAT, HUE_VAL),	// to color
-				LEDS,
-				colorsHSV
-			);
-			hsv2rgbList(colorsHSV, colorsRGB, LEDS);
+			
+			//~ interpolate(
+				//~ init_hsv_t(min, HUE_SAT, HUE_VAL),	// from color
+				//~ init_hsv_t(max, HUE_SAT, HUE_VAL),	// to color
+				//~ LEDS,
+				//~ colorsHSV
+			//~ );
+			//~ hsv2rgbList(colorsHSV, colorsRGB, LEDS);
 			// Check if reached amplitude
 			if(sign == 1 && (min >= HUE_MAX || max <= HUE_MIN)) {
 				sign = -1;
@@ -197,6 +208,15 @@ int main(void) {
 	}
 }
 
+void inline nextColor(hsv_t* hsvList, rgb_t* rgbList, hsv_t start, hsv_t end) {
+	interpolate(start,	// from color
+				end,	// to color
+				LEDS,
+				hsvList
+			);
+	hsv2rgbList(hsvList, rgbList, LEDS);
+}
+
 /***********************************************************************
 *
 * 	TIMING