Boogie-woogie is a style of piano-base blues that became very popular in the late 1930s and early 1940s, but originated much earlier, and was extended from piano, to three pianos at once, guitar, big band, and country and western music, and even gospel. Whilst the blues traditionally depicts sadness and sorrow, boogie-woogie is associated with dancing. The lyrics of one of the very earliest, "Pinetop's Boogie Woogie", consist entirely of instructions to dancers: