In keyboard music it was composed about 300 years ago which was animated and carefree movement in the minor mode -- by J S Bach in Weimar/Weimar/Leipzig influenced by Vivaldi, Italian older contemporary. Bach Works Catalogue was first published 75 years back with the composition and (now there are about 1200 in numbers -- many were lost and mistaken). Here, this brilliant performance/movement satisfies us with euphonical attraction.