#define RED 11
#define GREEN 10
#define BLUE 9

#include "Keypad.h"

int redHighLow = HIGH;
int greenHighLow = HIGH;
int blueHighLow = HIGH;
unsigned long previousMillis;
int ledState = HIGH;
char keypressed;
int delay_num = 0;
const byte Rows= 4; // количество строк на клавиатуре
const byte Cols= 4; // количество столбцов на клавиатуре
// определяем массив символов соответствующий распределению кнопок на клавиатуре:
char keymap[Rows][Cols]=
{
 {'1', '2', '3', 'A'},
 {'4', '5', '6', 'B'},
 {'7', '8', '9', 'C'},
 {'*', '0', '#','D'}
};
// соединения клавиатуры с выводами Arduino:
byte rPins[Rows]= {12,8,7,6};
byte cPins[Cols]= {5,4,3,2};
// создаем объект класса Keypad
Keypad kpd= Keypad(makeKeymap(keymap), rPins, cPins, Rows, Cols);

void color_switch(int red, int green, int blue){
  digitalWrite(BLUE, blue);
  digitalWrite(GREEN, green);
  digitalWrite(RED, red);
}

void blink(int num, unsigned long currentMillis){
  if(currentMillis - previousMillis > num){
    previousMillis = currentMillis;
    if(ledState == LOW){
      digitalWrite(BLUE, HIGH);
      digitalWrite(GREEN, HIGH);
      digitalWrite(RED, HIGH);
      ledState = HIGH;
    } else {
      color_switch(redHighLow, greenHighLow, blueHighLow);
      ledState = LOW;
    }
  }
}

void setup()
{
  Serial.begin(9600);
  pinMode(9, OUTPUT);
  digitalWrite(9, HIGH);
  pinMode(10, OUTPUT);
  digitalWrite(10, HIGH);
  pinMode(11, OUTPUT);
  digitalWrite(11, HIGH);
}


void loop()
{
  unsigned long currentMillis = millis();
  blink(delay_num, currentMillis);
  keypressed = kpd.getKey();
  if (keypressed != NO_KEY){
    switch(keypressed){
      case '0':{
        redHighLow = HIGH; 
        greenHighLow = HIGH;
        blueHighLow = HIGH;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '1':{
        redHighLow = HIGH; 
        greenHighLow = HIGH;
        blueHighLow = LOW;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '2':{
        redHighLow = HIGH; 
        greenHighLow = LOW;
        blueHighLow = HIGH;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '3':{
        redHighLow = LOW; 
        greenHighLow = HIGH;
        blueHighLow = HIGH;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '4':{
        redHighLow = HIGH; 
        greenHighLow = LOW;
        blueHighLow = LOW;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '5':{
        redHighLow = LOW; 
        greenHighLow = HIGH;
        blueHighLow = LOW;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '6':{
        redHighLow = LOW; 
        greenHighLow = LOW;
        blueHighLow = HIGH;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case '7':{
        redHighLow = LOW; 
        greenHighLow = LOW;
        blueHighLow = LOW;
        color_switch(redHighLow, greenHighLow, blueHighLow);
        break;
      }
      case 'A':{
      delay_num = 0; 
      color_switch(redHighLow, greenHighLow, blueHighLow);
      break;
      }
      case 'B':{
        delay_num = 1000; 
        break;
      }
      case 'C':{
        delay_num = 500; 
        break;
      }
      case 'D':{
        delay_num = 250; 
        break;
      }
      default : {break;}
    }
  }
}