Theres a certain thing on the music called a time signature . this specifies the certain beats per measure 
        
             
        
        
        
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society wise, it's unoriginal and bland with senseless lyrics
but to a musician's ears, it might be how it's composed and how it sounds generally 
 
        
             
        
        
        
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 if your questions are waste then it should be deleted 
hiiii 
how are you
 
        
                    
             
        
        
        
Yes, whenever an object blocks light the area of darkness expands. For example when the moon blocks the sun completely during an eclipse causing a large area of earth to be completely dark as if it was nighttime during daytime.