#define ledGreen 13
#define ledYellow 12
#define ledRed 11
#define pushGreen 7

int status=0;

void setup(){
  pinMode(ledGreen, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(pushGreen, INPUT);
  digitalWrite(ledGreen, LOW);
  digitalWrite(ledYellow, LOW);
  digitalWrite(ledRed, LOW);
}
void loop(){

  if(digitalRead(pushGreen)==HIGH){
  delay(100);
   digitalWrite(ledYellow, HIGH);
  delay(3000);
  digitalWrite(ledYellow, LOW);
  digitalWrite(ledRed, HIGH);
  delay(5000);
  digitalWrite(ledYellow, HIGH);
  delay(2000);
  digitalWrite(ledYellow, LOW);
  digitalWrite(ledRed, LOW);
  digitalWrite(ledGreen, HIGH);
  delay(2000);
  digitalWrite(ledGreen, LOW);  
  }
}