//pin phase
#define phase_1_green 2
#define phase_1_yellow 3
#define phase_1_red 4
#define phase_2_green 5
#define phase_2_yellow 6
#define phase_2_red 7

int cycletime = 9;
int yellow = 1;
float greenratio = 0.6;
int greentot, greenphase1, greenphase2;

void setup() {
  pinMode(phase_1_green, OUTPUT);
  pinMode(phase_1_yellow, OUTPUT);
  pinMode(phase_1_red, OUTPUT);
  pinMode(phase_2_green, OUTPUT);
  pinMode(phase_2_yellow, OUTPUT);
  pinMode(phase_2_red, OUTPUT);
  cycletime *= 1000;
  yellow *= 1000;
  greentot = cycletime - (yellow * 2);
  greenphase1 = greenratio * greentot;
  greenphase2 = greentot - greenphase1;
}

void loop() {
  digitalWrite(phase_1_green, HIGH);
  digitalWrite(phase_2_red, HIGH);
  delay(greenphase1);
  digitalWrite(phase_1_green, LOW);
  digitalWrite(phase_1_yellow, HIGH);
  delay(yellow);
  digitalWrite(phase_1_yellow, LOW);
  digitalWrite(phase_2_red, LOW);

  digitalWrite(phase_2_green, HIGH);
  digitalWrite(phase_1_red, HIGH);
  delay(greenphase2);
  digitalWrite(phase_2_green, LOW);
  digitalWrite(phase_2_yellow, HIGH);
  delay(yellow);
  digitalWrite(phase_2_yellow, LOW);
  digitalWrite(phase_1_red, LOW);
}