Throughout the song, there is counting, so the beginners could catch the rhythm. Un dos tres,cinco, seis, siete(deliberately skipping cuatro-because when counting steps for salsa, cuatro is pause)..All sorts of music instruments are slowly being incorporated in song, so in the beginning of the song, after un, dos tres, the singer says "maracas"..Afterwards its guitar(guitara), and bongo(or conga)..