#define RLED 23
#define YLED 22
#define RedSW 2
#define YellowSW 4
void setup() {
  pinMode(RLED, OUTPUT);
  pinMode(YLED, OUTPUT);
  pinMode(RedSW, INPUT_PULLUP);
  pinMode(YellowSW, INPUT_PULLUP);
  digitalWrite(RLED,HIGH); 
  digitalWrite(YLED,HIGH);

}
int status1 = 0;
int status2 = 0;
void loop() {
  if(digitalRead(RedSW)== LOW)
  {
     if(++status1>2) status1 =1;  
     while(digitalRead(RedSW)==LOW) delay(50);
  }
  switch(status1)
  {
    case 1: digitalWrite(RLED, LOW);  
            break;
    case 2: digitalWrite(RLED, HIGH); 
            break;      
  } 
   if (digitalRead(YellowSW)== LOW)
  {
     if(++status2>2) status2 =1;  
     while(digitalRead(YellowSW)== LOW) delay(50);
  }
  switch(status2)
  {
    case 1: digitalWrite(YLED, LOW);  
            break;
    case 2: digitalWrite(YLED, HIGH); 
            break;      
  } 
  delay(20);
}