#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

const int B=2, G=3, Y=4, O=5, R=6, P=7, Pr=8;
int pot=A0;
int potVal=0;
int slideVal;
int color_code;

String color[] = {
  "Red   ","Orange","Yellow","Green ","Blue  ","Pink  ","Purple"};

void setup() {
  pinMode(B, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(Y, OUTPUT);
  pinMode(O, OUTPUT);
  pinMode(R, OUTPUT);
  pinMode(pot, INPUT);
  lcd.init();
  lcd.backlight();
  
}

void loop() {
  potVal=analogRead(pot);
  slideVal=analogRead(pot);
  potVal=map(potVal,0,1023,2,8);
  
  switch(potVal)
  {
    case 2: digitalWrite(B, HIGH);digitalWrite(G, LOW);digitalWrite(Y, LOW);
            digitalWrite(O, LOW);digitalWrite(R, LOW);digitalWrite(P, LOW);
            digitalWrite(Pr, LOW); 
            break;
    case 3: digitalWrite(G, HIGH);digitalWrite(B, LOW);digitalWrite(Y, LOW);
            digitalWrite(O, LOW);digitalWrite(R, LOW);digitalWrite(P, LOW);
            digitalWrite(Pr, LOW);
            break;
    case 4: digitalWrite(Y, HIGH);digitalWrite(G, LOW);digitalWrite(B, LOW);
            digitalWrite(O, LOW);digitalWrite(R, LOW);digitalWrite(P, LOW);
            digitalWrite(Pr, LOW); 
            break;
    case 5: digitalWrite(O, HIGH);digitalWrite(G, LOW);digitalWrite(Y, LOW);
            digitalWrite(B, LOW);digitalWrite(R, LOW);digitalWrite(P, LOW);
            digitalWrite(Pr, LOW);
            break;
    case 6: digitalWrite(R, HIGH);digitalWrite(G, LOW);digitalWrite(Y, LOW);
            digitalWrite(O, LOW);digitalWrite(B, LOW);digitalWrite(P, LOW);
            digitalWrite(Pr, LOW);
            break;
    case 7: digitalWrite(P, HIGH);digitalWrite(G, LOW);digitalWrite(Y, LOW);
            digitalWrite(O, LOW);digitalWrite(R, LOW);digitalWrite(B, LOW);
            digitalWrite(Pr, LOW);
            break;
    case 8: digitalWrite(Pr, HIGH);digitalWrite(G, LOW);digitalWrite(Y, LOW);
            digitalWrite(O, LOW);digitalWrite(R, LOW);digitalWrite(P, LOW);
            digitalWrite(B, LOW);
            break;
  }

  color_code=map(potVal,2,8,0,6);

  lcd.setCursor(0,0);
  lcd.print("Slide LED Controller");
  lcd.setCursor(0,2);
  lcd.print("Pin Address:");
  lcd.setCursor(13,2);
  lcd.print(potVal);
  lcd.setCursor(0,3);
  lcd.print("LED Color:");
  lcd.setCursor(11,3);
  lcd.print(color[color_code]);

}