To Do

  1. Write a sketch which displays a frownie, rather than a smiley, on the
    Serial Console.

  2. Use the Arduino function micros() to see how long various Serial.print()
    calls take. Hint: since micros() produces a result of type unsigned long,
    declare two variables (say, t0 and t1) like this:

    unsigned long t0 = 0;
    unsigned long t1;

Then execute:

t0 = micros();
...             // Enter your Serial.print statements hered
t1 = micros();
Serial.print(t1 - t0);
  1. Write a sketch that produces a multiplication table for all the
    integers between 1 and 10.