Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Very important thing for today: \n\nDo not #bully yourself with #100DaysOfCode \n\nBelieve me, It ruins fun!
This tweet contains emotions: 
sadness