#define red 7
#define yellow 5
#define green 6
void setup()
{
  pinMode(red , OUTPUT);
  pinMode(yellow ,OUTPUT);
  pinMode(green , OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  digitalWrite(red , HIGH);
  delay(1000);
  Serial.println(" stop");
  digitalWrite(red , LOW);
  delay(3000);
   digitalWrite(yellow, HIGH);
   delay(2000);
   Serial.println(" getready ");
  digitalWrite(yellow , LOW);
  delay(2000);
  digitalWrite(green, HIGH);
  delay(3000);
  Serial.println(" go");
  digitalWrite(green, LOW);
  delay(2000);
}