Can anyone help me graph enumerated values vs dates?

I have data like 10-21 Green; 10-22 Yellow; 10-23 Red; 10-24 Yellow; 10-25 Green. Think of this as an air quality level by day.

I would like the dates to appear across the bottom and for the enumerated values (Green, Yellow, Red) to appear on the vertical y-axis. Above each date would be bullet(s) indicating the enumerated value for that day.

If I define the enumerated values, they would have indexes of 1, 2, and 3 and they would have names of "Green", "Yellow", and "Red".

My graph needs to use the index as the plot value but use the name as the y-axis label.

Any thoughts would be most welcomed.