why won't the green LED on the right turn on?

int Green = 11;
int Yellow = 12;
int Red = 13;
int RedPeople = 10;
int Blue = 9;
int C2Red = 8;
int C2Yellow = 7;
int C2Green = 1;

void setup()
{
pinMode(Green, OUTPUT);
pinMode(Yellow, OUTPUT);
pinMode(Red, OUTPUT);
pinMode(RedPeople, OUTPUT);
pinMode(Blue, OUTPUT);

//green light on
digitalWrite(Green, HIGH);
digitalWrite(RedPeople, HIGH);
digitalWrite(C2Red, HIGH);
delay(3000);
digitalWrite(Green, LOW);

digitalWrite(Yellow, HIGH);
digitalWrite(RedPeople, HIGH);
delay(3000);
digitalWrite(Yellow, LOW);
digitalWrite(RedPeople, LOW);
digitalWrite(C2Red, LOW);

//red light on
digitalWrite(Red, HIGH);
digitalWrite(Blue, HIGH);
digitalWrite(C2Green, HIGH);
delay(3000);
digitalWrite(Blue, LOW);
digitalWrite(C2Green, LOW);
digitalWrite(C2Yellow, HIGH);
digitalWrite(RedPeople, HIGH);
delay(200);
digitalWrite(RedPeople, LOW);
delay(200);
digitalWrite(RedPeople, HIGH);
delay(200);
digitalWrite(RedPeople, LOW);
delay(200);
digitalWrite(RedPeople, HIGH);
delay(200);
digitalWrite(RedPeople, LOW);
delay(200);

}
void loop()
{
}

// put your main code here, to run repeatedly:

You have it connected wrong.
Or, if you mean ‘C2Green’, it might be because you have it assigned to one of the serial pins (0 and 1).

  digitalWrite(C2Red, HIGH);

Why are you writing to an input pin?