// Understanding for Loops // leds blinking code using for loops
int j;
int redblink=3;
int yellowblink=5;
int yellowdelay=500;
int reddelay =660;
int yellowpin = 9;
int redpin = 6;
void setup() {
  // put your setup code here, to run once:
  pinMode(redpin,OUTPUT);
  pinMode(yellowpin,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(j=1; j<=yellowblink ; j=j+1){
    digitalWrite(yellowpin , HIGH);
    delay(yellowdelay);
    digitalWrite(yellowpin , LOW);
    delay(yellowdelay);
  }
  for(j=1; j<=redblink ;j=j+1)
  {
    digitalWrite(redpin , HIGH);
    delay(reddelay);
    digitalWrite(redpin , HIGH);
    delay(reddelay);
  }
}