#include <LiquidCrystal_I2C.h>
#include <Servo.h>

LiquidCrystal_I2C lcd(0x027, 20,4);
Servo servo;

int rgb[] ={11,10,9};

int red_led=8;
int green_led=7;

int pot=A0;

int pb=4;

int pb_state= HIGH;

bool work=false;

int angle =-1;

int direction =1;

float seconds=0.0;

void setup() {
  // put your setup code here, to run once:
   lcd.begin(20,4);
   lcd.backlight();
   lcd.setCursor(0,0);

   servo.attach(3);

   for(int x=0; x<3;x++){
    pinMode(rgb[x], OUTPUT);
   }

   pinMode(red_led, OUTPUT);
   pinMode(green_led, OUTPUT);

   pinMode(pb, INPUT_PULLUP);
}

void loop() {
  
   seconds = map(analogRead(pot), 0,1023,500, 2000);
  // put your main code here, to run repeatedly:
   pb_state= digitalRead(pb);

   if(pb_state==LOW){
    work= !work;
    while(digitalRead(pb)==LOW){

    }   
   }

   if(work==true){
    if(angle<0){
      angle=0;
      direction=1;
    }

    if(angle>180){
      angle=180;
      direction =-1;
    }
    
    angle +=direction;
    servo.write(angle);
    
   }

    if(angle==0 ){
      analogWrite(rgb[0], 255);
      analogWrite(rgb[1], 255);
      analogWrite(rgb[2], 255);
      //delay(500);
      digitalWrite(red_led, HIGH);
      delay(1000);
      digitalWrite(red_led, LOW);
      lcd.print("color: red    ");
      lcd.setCursor(0,1);
      lcd.print("angle: ");
      lcd.print(angle);
      lcd.print("      ");
      delay(seconds);

    }


   if(angle==180){
      analogWrite(rgb[0], 255);
      analogWrite(rgb[1], 255);
      analogWrite(rgb[2], 255);
      //delay(500);
      digitalWrite(green_led, HIGH);
      delay(1000);
      digitalWrite(green_led, LOW);
      lcd.print("color: green    ");
      lcd.setCursor(0,1);
      lcd.print("angle: ");
      lcd.print(angle);
      lcd.print("      ");
      delay(seconds);
    }
    if(angle>0 && angle<180){    
      analogWrite(rgb[0], 255);
      analogWrite(rgb[1], 255);
      analogWrite(rgb[2], 0);
      lcd.print("color: yellow     ");  
      lcd.setCursor(0,1);
      lcd.print("angle: ");
      lcd.print(angle);
      lcd.print("      ");
    }
      lcd.setCursor(0,2);
      lcd.print("delay: ");
      lcd.print(seconds/1000);
      lcd.print("      ");
      lcd.setCursor(0,0);
      delay(10);
}