#define led0 4
#define led1 3
#define led2 2
void setup() 
{
  // put your setup code here, to run once:
pinMode(led0, OUTPUT);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);


}

void loop()
{
  
digitalWrite(led0, 0);
delay(100);
digitalWrite(led0, 1);
delay(100);

digitalWrite(led1, 0);
delay(100);
digitalWrite(led1, 1);
delay(100);

digitalWrite(led2, 0);
delay(100);
digitalWrite(led2, 1);
delay(100);

  // put your main code here, to run repeatedly:

}