unsigned long currentMillis;
unsigned long duration_green = 2000;
unsigned long duration_red = 2000;
unsigned long time_1;
unsigned long time_2;


void setup()
{
  pinMode(3,OUTPUT); // LED on lähtönä
  pinMode(4,OUTPUT);

  pinMode(7,INPUT); // Alustetaan kytkin tuloksi
  digitalWrite(3,HIGH); // Alkutilanne
}


void loop()
{
currentMillis = millis();

if(digitalRead(7) == HIGH)
{
if(currentMillis > (time_1 + (duration_red)) && currentMillis < (duration_red+duration_green))
{
time_1 = currentMillis;
digitalWrite(3,LOW);
digitalWrite(4,HIGH);
}
if(currentMillis > (time_2 + (duration_red+duration_green)))
{
time_2 = currentMillis;
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}
}

else if(digitalRead(7) == LOW)
{
digitalWrite(3,LOW);
digitalWrite(4,LOW);
duration_red = duration_red+currentMillis;
duration_green = duration_green+currentMillis;

}
}