- Toggles LED every 500ms
- Reads sample from ADC
- Stores value in queue
- Waits for value to enter queue
- Writes value from queue to screen if user has typed "start"
- Stores characters in buffer until ENTER key is pressed
- "start" causes values to be printed to screen in Task 3
- If Task 3 is printing to screen, then another ENTER key will stop it