int green = 1;
int yellow = 2;
int red = 3;
int greenKn = 4;
int yellowKn = 5;
int redKn = 6;


void setup(){
 pinMode(green, OUTPUT);
 pinMode(yellow, OUTPUT);
 pinMode(red, OUTPUT);
 pinMode(greenKn, OUTPUT);
 pinMode(yellowKn, OUTPUT);
 pinMode(redKn,OUTPUT);
 digitalWrite(redKn, HIGH);
}
void loop(){
 digitalWrite(green, HIGH);
 digitalWrite(yellow,LOW);
 digitalWrite(red, LOW);
 delay(5000);

 digitalWrite(green, LOW);
 digitalWrite(yellow, HIGH);
 delay(2000);

 digitalWrite(yellow, LOW);
 digitalWrite(red, HIGH);
 digitalWrite(greenKn, HIGH);
 digitalWrite(redKn, LOW);
 delay(5000);

 digitalWrite(yellowKn, HIGH);
 digitalWrite(greenKn, LOW);
 delay(2000);

 digitalWrite(red, LOW);
 digitalWrite(yellowKn, LOW);
}