#define LED1 8
#define LED2 9 
#define PB1 12
#define PB2 13
#define LED3 10
#define LED4 11
void setup()
{
pinMode(PB1, INPUT); 
pinMode(PB2, INPUT); 
pinMode (LED1, OUTPUT); 
pinMode (LED2, OUTPUT); 
pinMode(LED3, OUTPUT);
pinMode(LED4,OUTPUT);
}
void loop()

{
if(digitalRead(PB1)== HIGH)
for (;;)
{
digitalWrite (LED1, HIGH); 
digitalWrite(LED3, HIGH);
digitalWrite (LED2, LOW);
digitalWrite(LED4, LOW); 
delay (2000); // Delay for 2 second

digitalWrite (LED1, LOW);
digitalWrite(LED2, HIGH); 
digitalWrite (LED3, HIGH);
digitalWrite(LED4, LOW); 
delay(1000); // Delay for 1 second

digitalWrite (LED1, LOW); 
digitalWrite(LED3, LOW);
digitalWrite (LED2, HIGH);
digitalWrite(LED4, HIGH); 
delay (2000); // Delay for 2 second

digitalWrite (LED1, LOW); 
digitalWrite(LED3, HIGH);
digitalWrite (LED2, HIGH);
digitalWrite(LED4, LOW); // 
delay (1000); // Delay for 1 second

if (digitalRead(PB2) == HIGH)

{
digitalWrite (LED1, LOW); 
digitalWrite(LED3, LOW);
digitalWrite (LED2, LOW);
digitalWrite(LED4, LOW); 
break;
}
}
}