// declare section.

int myInts[6];
int myPins[] = {2, 4, 8, 3, 6};
int mySensVals[5] = {2, 4, -8, 3, 2};
int myArray [5][4] =
{
  {0, 0, 0, 1},
  {0, 0, 0, 1},
  {0, 0, 0, 1},
  {0, 0, 0, 1},
  {0, 0, 0, 1},
};
int incomingByte = 0; // for incoming serial data

char message[6] = "hello";
int led_pin_no;
int input1;

// input
# define z1 1
// memory
int read_z1 =2;

// initial section.

void setup() {
  // put your setup code here, to run once:
  //Serial.begin(115200);
  Serial.begin(9600);
  for (led_pin_no = 13; led_pin_no < 8 ; led_pin_no--) {
    pinMode(led_pin_no, OUTPUT);
  };
}

// main program.

void loop() {
  // put your main code here, to run repeatedly:
  
    Serial.println("Start program");
    Serial.println("turn on all");
    turn_on_led();
    turn_off_led();
    Serial.println("turn on L-R");
    turn_on_led_L();
    turn_off_led();
    Serial.println("turn on R-L");
    turn_on_led_R();
    turn_off_led();
    Serial.println("Start Print character");
    print_char(10);
    Serial.println("Start Print array");
    print_myArray();
  
  Serial.println("Start input a");
  if (Serial.available() > 0) {
     Serial.println("Start input b1");
    // read the incoming byte:
    incomingByte = Serial.read();

    // say what you got:
    Serial.print("I received: ");
    Serial.println(incomingByte, DEC);
   
  } else {
     Serial.println("Start input b2");
     Serial.available();
  }

  Serial.println("Start input c");
  Serial.println(z1);  // from memory
  delay(1000);
  Serial.println(read_z1);   // from define
  delay(1000);
  // test_serial_read();
 // input_k();

}

/*   function turn on led  */

void turn_on_led() {
  led_pin_no = 13;
  while (led_pin_no > 9) {
    digitalWrite(led_pin_no, 1); //turn light
    led_pin_no--;
  }
  delay(500);
}


/*   function turn on led  */

void turn_on_led_R() {
  led_pin_no = 10;
  while (led_pin_no <= 13) {
    digitalWrite(led_pin_no, 1); //turn light
    delay(500);
    led_pin_no++;
  }

}

/*   function turn off led  */
void turn_off_led() {
  led_pin_no = 9;
  for (led_pin_no = 9; led_pin_no <= 13; led_pin_no++)
  {
    digitalWrite(led_pin_no, 0); //turn off
  }
  delay(500);
}

void turn_on_led_L() {
  led_pin_no = 13;
  while (led_pin_no > 9) {
    digitalWrite(led_pin_no, 1); //turn light
    delay(500);
    led_pin_no--;
  }
}

void print_char(int input1) {
  for (input1; (20 >= input1); input1++) {
    Serial.println(input1);
  };
  Serial.println("end parameter");
}

void print_myArray() {

  for (int i = 0; 4 >= i; i++) {
    Serial.println(myPins[i]);
    delay(1000);
  };
  Serial.println("end array");
  /*
    Serial.println(myPins[0]);
    Serial.println(myPins[1]);
    Serial.println(myPins[2]);
    Serial.println(myPins[4]);
  */

}
void test_serial_read() {
  // send data only when you receive data:
  if (Serial.available() > 0) {
    // read the incoming byte:
    incomingByte = Serial.read();

    // say what you got:
    Serial.print("I received: ");
    Serial.println(incomingByte, DEC);
  }
}
void input_k() {
  Serial.println("Enter data:");
  while (Serial.available() == 0) {}     //wait for data available
  String teststr = Serial.readString();  //read until timeout
  teststr.trim();                        // remove any \r \n whitespace at the end of the String
  if (teststr == "red") {
    Serial.println("A primary color");
  } else {
    Serial.println("Something else");
  }

}