// Delay-Free Timing 03
//
// In this case, we will set up a bunch of independent timers
// And, we'll use only one function instead of 6!

// Set variables
// Set up three timers, each with a different offset to check against.
long timer1 = 0;           
int  timer1offset = 1000;                         
long timer2 = 0;           
int  timer2offset = 900;                         
long timer3 = 0;           
int  timer3offset = 800;   
long timer4 = 0;           
int  timer4offset = 700;   
long timer5 = 0;           
int  timer5offset = 600;   
long timer6 = 0;           
int  timer6offset = 500;   

// Setup pins
int ledPin1 = 11; // Note: needed to change the number of the pins 
int ledPin2 = 10; // from Delay-Free Timing 02, but the idea is the same.
int ledPin3 = 9;
int ledPin4 = 6;
int ledPin5 = 5;
int ledPin6 = 3;

void setup() {                  // The standard stuff...
  Serial.begin(9600);         // Setup the serial communications so we can debug
  // Save some vertical space by combining lines
  pinMode(ledPin1, OUTPUT); pinMode(ledPin2, OUTPUT); pinMode(ledPin3, OUTPUT);   
  pinMode(ledPin4, OUTPUT); pinMode(ledPin5, OUTPUT); pinMode(ledPin6, OUTPUT); 
  timer1 = millis(); timer2 = millis(); timer3 = millis();
  timer4 = millis(); timer5 = millis(); timer6 = millis();   
  // Start with all pins on
  digitalWrite(ledPin1,HIGH); digitalWrite(ledPin2,HIGH); digitalWrite(ledPin3,HIGH);
  digitalWrite(ledPin4,HIGH); digitalWrite(ledPin5,HIGH);  digitalWrite(ledPin6,HIGH); 
}

// Das Loop...
void loop() {
  if((timer1 + timer1offset) < millis() ) {   //Timer 1
     doLED(ledPin1);              
     timer1 = millis();  
  }
  if((timer2 + timer2offset) < millis() ) {   //Timer 2
     doLED(ledPin2);              
     timer2 = millis();  
  }
  if((timer3 + timer3offset) < millis() ) {   //Timer 3
     doLED(ledPin3);              
     timer3 = millis();  
  }
  if((timer4 + timer4offset) < millis() ) {   //Timer 4
     doLED(ledPin4);              
     timer4 = millis();  
  }
  if((timer5 + timer5offset) < millis() ) {   //Timer 5
     doLED(ledPin5);              
     timer5 = millis();  
  }
  if((timer6 + timer6offset) < millis() ) {   //Timer 6
     doLED(ledPin6);              
     timer6 = millis();  
  }
}

// The doLED functions
void doLED(int whichLED) {
  Serial.print("LED");Serial.print(whichLED);Serial.print(": ");
  Serial.println(!digitalRead(whichLED));
  digitalWrite(whichLED,!digitalRead(whichLED));
}