Exercises: Exercise 4-1. LED thermometer Make a sketch called Thermometer that makes all six LEDs light up, going from pin 2 through pin 7, and then go dark from pin 7 through pin 2, with 1/10th second between each change, thermometer style. The sketch must: . Begin with all LEDs off. Light the LED connected to pin 2, then wait 1/10th second. Leaving the LED connected to pin 2 on, light the LED connected to pin 3. Wait 1/10th second. Leaving the first two LEDs (pins 2 and 3) on, light the LED connected to pin 4. Wait 1/10th second, and continue until the LEDs on pins 2 through 7 are on. After leaving all LEDs on for 1/10th second, extinguish the LED connected to pin 7 and wait 1/10th second. Leaving the LED connected to pin 7 extinguished, turn off the LED connected to pin 6 and wait 1/10th second, and continue until all LEDs are off. Wait 1/10 second. By placing the code that does this in the loop() method, the pattern should repeat over and over. on arotah