For the first window, we will use Netcat (or nc) to manually send events such as blue, green, and gohawks. To start Netcat, use this command; we will direct our events to port 9999, where our Spark Streaming job will detect:

nc -lk 9999

To match the previous diagram, we will type in our events so that the console screen looks like this:

$nc -lk 9999
blue blue blue blue blue green green green
gohawks
green green