Arduino Светофор

#define red 2
#define yellow 3
#define green 4
#define POT_PIN A0

void setup()
{
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(POT_PIN, INPUT);
}

void loop()
{
  int rotation, k;
  rotation = analogRead(POT_PIN);
  k = rotation/100;
  digitalWrite(red, HIGH);
  delay(1000+100*k);
  digitalWrite(yellow, HIGH);
  delay(250+100*k);
  digitalWrite(yellow, LOW);
  digitalWrite(red, LOW);


  digitalWrite(green, HIGH);
  delay(1250+100*k);
  digitalWrite(green, LOW);

  digitalWrite(yellow, HIGH);
  delay(500+100*k);
  digitalWrite(yellow, LOW);
}