In European circles, different note values have names; a 1-beat note is known as a 'crotchet', 2-beat note is a 'minim', and a 4-beat note is a 'semi-breve'. You can also use 1/2-beat notes ...

If the bottom note is a 4, this indicates a quarter note or crotchet. Connect this with the 4 which is above, and it means you have 4 crotchet or 1/4-note beats to a bar. Time for a waltzYou could ...