//Created by Barbu Vulc!
/*This was a recent college miniproject with the purpose
  of demonstrating a highly used concept: „concurrent programming”!
*/
unsigned long start = 0;
unsigned long LED1_prev = 0; 
unsigned long LED1_int = 1000; //Blink 1 second!
unsigned long LED2_prev = 0;
unsigned long LED2_int = 250;  //Blink 250 milliseconds!

#define LED1 8
#define LED2 10
int LED1_state = 0;
int LED2_state = 0;

void setup(){
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

//LEDs will blink according to their assigned blinking interval!
void loop(){
  //„millis()” function...
  start = millis();
  
  if(start - LED1_prev > LED1_int){
    LED1_prev = start;
    LED1_state = !LED1_state;
    digitalWrite(LED1, LED1_state);
  }
  if(start - LED2_prev > LED2_int){
    LED2_prev = start;
    LED2_state = !LED2_state;
    digitalWrite(LED2, LED2_state);
  }
}