int pinR = 4; // Red LED pin number
int pinG = 5; // Green LED pin number
int pinB = 6; // Blue LED pin number

void setup() {
  pinMode(pinR, OUTPUT); // Set red pin as output mode
  pinMode(pinG, OUTPUT); // Set green pin as output mode
  pinMode(pinB, OUTPUT); // Set blue pin as output mode
}

void loop() {
  int value = analogRead(A0); // Read input from analog pin A0
  
  // Display red color
  digitalWrite(pinR, HIGH); // Turn on red LED
  delay(value); // Wait for a moment
  digitalWrite(pinR, LOW); // Turn off red LED
  
  // Display green color
  digitalWrite(pinG, HIGH); // Turn on green LED
  delay(value); // Wait for a moment
  digitalWrite(pinG, LOW); // Turn off green LED
  
  // Display blue color
  digitalWrite(pinB, HIGH); // Turn on blue LED
  delay(value); // Wait for a moment
  digitalWrite(pinB, LOW); // Turn off blue LED
}