array.ino

int sensorPin = A0;
int timer = 0;           // The higher the number, the slower the timing.
int ledPins1[] = {6,7,8,9};       // an array of pin numbers to which LEDs are attached
int ledPins2[] = {10,11,12,13}; 
int pinCount = 4;           // the number of pins (i.e. the length of the array)
int state = 0;
 
const int buttonPin = 2;
const long doubleClickThreshold = 200;
const long debounceThreshold = 60;
 
unsigned long currentTime;
volatile unsigned long prevTime;
volatile int prevState = 0;
 
void setup() {
  // the array elements are numbered from 0 to (pinCount - 1).
  // use a for loop to initialize each pin as an output:
  pinMode(buttonPin, INPUT);
  for (int thisPin = 0; thisPin < pinCount; thisPin++)  {
    pinMode(ledPins1[thisPin], OUTPUT); 
    pinMode(ledPins2[thisPin], OUTPUT);  
  }
  
  attachInterrupt(0, blink, RISING );
}
 
void blink()
{
  currentTime = millis();
  
  if ((currentTime - prevTime) > debounceThreshold) {
    if ((currentTime - prevTime) <= doubleClickThreshold) {
      prevState = 3;
    } else {
      if (prevState == 1) {
        prevState = 0;
      } else if (prevState == 0) {
        prevState = 1;
      } else if (prevState == 3) {
        prevState = 0;
      }
    }
  }
  
  prevTime = currentTime;
}
 
void loop() {  
  timer = analogRead(sensorPin);
  
  if (prevState == 1) { 
    // loop from the lowest pin to the highest:
    for (int thisPin = 0; thisPin < pinCount; thisPin++) { 
      digitalWrite(ledPins1[thisPin], HIGH);   
      delay(timer);                  
      // turn the pin off:
      digitalWrite(ledPins1[thisPin], LOW);           
    }
    
    delay(timer); 
  }
  
  
  else if (prevState == 0) { 
    // loop from the lowest pin to the highest:
    for (int thisPin = 0; thisPin < pinCount; thisPin++) { 
      digitalWrite(ledPins2[thisPin], HIGH);   
      delay(timer);                  
      // turn the pin off:
      digitalWrite(ledPins2[thisPin], LOW);   
    }
    
    delay(timer); 
    
  } else if (prevState == 3) {
    // loop from the lowest pin to the highest:
    for (int thisPin = 0; thisPin < pinCount; thisPin++) { 
      // turn the pin on:
      digitalWrite(ledPins1[thisPin], HIGH);   
      delay(timer);                  
      // turn the pin off:
      digitalWrite(ledPins1[thisPin], LOW); 
    }
    
    delay(timer); 
    
    // loop from the highest pin to the lowest:
    for (int thisPin = 0; thisPin < pinCount; thisPin++) { 
      // turn the pin off:
      digitalWrite(ledPins2[thisPin], HIGH);   
      delay(timer);                  
      // turn the pin off:
      digitalWrite(ledPins2[thisPin], LOW);
    }
    
    delay(timer); 
  }
}