90 seconds to learn how to play a basic drum fill

Let's learn how to play a basic drum fill which is a short musical passage during a break between the phrases in 90 seconds.
Japanese Learning Course for JLPT N4 Level
Learn about a Japanese Castle (Shiro) in 90 seconds Learn about a Japanese Castle (Shiro) in 90 seconds
Learn the hierarchy among Buddhist statues in 90 seconds Learn the hierarchy among Buddhist statues in 90 seconds
90 seconds to know about VSCO photo-editing app 90 seconds to know about VSCO photo-editing app
90 seconds to know the difference btw eye fatigue and eyestrain 90 seconds to know the difference btw eye fatigue and eyestrain