This exercise for the Left Handed guitarist uses the Am7b5, Dm7b5 and Em7b5 chords which are each shown separately for you. Once you know how to play each chord try the exercises to get use to changing between chords and learning how to get the timing with your left hand by strumming as shown.
The Count 'numbers' show you the timing while the BLUE vertical
line (appears when you click on PLAY) shows you when to strum with your Left
Hand and how long to hold the chord with your Right Hand along with the count.