/**********************************************************************************

ten leds are connected to pin 2 to  11 pins of arduino  write a code in c plus
 in such a way that  evevn number of leds chase to and fro then odd numbers
  do the same thing then afyer dealyof 3 seconds all led chases to and fro 
  for three cycles and the all  blink for five time
This code defines an array leds that contains the pin numbers of the 
10 LEDs connected to the Arduino, as well as some variables to control 
the delay time,  number of cycles,
author arvind patil india 
date 24 march 2023
liscence MiT eng


***************************************************************************/

int leds[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; // Array of LED pins
int numLeds = sizeof(leds) / sizeof(leds[0]); // Number of LEDs
int delayTime = 1000; // Delay time between LED changes
int cycles = 3; // Number of cycles for all LEDs to chase
int blinkTimes = 5; // Number of times for all LEDs to blink

void setup() {
  for (int i = 0; i < numLeds; i++) {
    pinMode(leds[i], OUTPUT); // Set all LED pins as outputs
  }
}

void loop() {
  evenLeds(); // Chase even-numbered LEDs
  oddLeds(); // Chase odd-numbered LEDs
  allLeds(); // Chase all LEDs
  blinkAll(); // Blink all LEDs
}

void evenLeds() {
  for (int i = 0; i < numLeds; i += 2) {
    digitalWrite(leds[i], HIGH); // Turn on even-numbered LED
    delay(delayTime);
    digitalWrite(leds[i], LOW); // Turn off even-numbered LED
  }
  for (int i = numLeds - 2; i >= 0; i -= 2) {
    digitalWrite(leds[i], HIGH); // Turn on even-numbered LED
    delay(delayTime);
    digitalWrite(leds[i], LOW); // Turn off even-numbered LED
  }
}

void oddLeds() {
  for (int i = 1; i < numLeds; i += 2) {
    digitalWrite(leds[i], HIGH); // Turn on odd-numbered LED
    delay(delayTime);
    digitalWrite(leds[i], LOW); // Turn off odd-numbered LED
  }
  for (int i = numLeds - 1; i >= 0; i -= 2) {
    digitalWrite(leds[i], HIGH); // Turn on odd-numbered LED
    delay(delayTime);
    digitalWrite(leds[i], LOW); // Turn off odd-numbered LED
  }
}

void allLeds() {
  for (int j = 0; j < cycles; j++) {
    for (int i = 0; i < numLeds; i++) {
      digitalWrite(leds[i], HIGH); // Turn on all LEDs
      delay(delayTime);
      digitalWrite(leds[i], LOW); // Turn off all LEDs
    }
    for (int i = numLeds - 1; i >= 0; i--) {
      digitalWrite(leds[i], HIGH); // Turn on all LEDs
      delay(delayTime);
      digitalWrite(leds[i], LOW); // Turn off all LEDs
    }
  }
}

void blinkAll() {
  for (int i = 0; i < blinkTimes; i++) {
    for (int j = 0; j < numLeds; j++) {
      digitalWrite(leds[j], HIGH); // Turn on all LEDs
    }
    delay(delayTime);
    for (int j = 0; j < numLeds; j++) {
      digitalWrite(leds[j], LOW); // Turn off all LEDs
    }
    delay(delayTime);
  }
}