Using a for Loop to Blink LEDs with Arduino | Task 3

Modify the code to repeat yellow blinking

Now that your traffic light is working, let’s make the yellow LED blink 3 times before the red light comes on.

To do this, we’ll use a for loop. It allows us to repeat actions in a controlled way.

      // Yellow LED blinks three times
      for (val = 0; val < 3; val = val + 1) {
        digitalWrite(yellowLed, HIGH);
        delay(dtYellow);
        digitalWrite(yellowLed, LOW);
        delay(dtYellow);
      }
        

💡 Try replacing your original yellow LED code with the for loop above.