To play, touch/click each bar or press: (Numbers )1=C, 2=D, 3=E, 4=F, 5=G, 6=A, 7=B, 8=C', 9=D', 0=E' (Letters) I=F', O=G', P=A' To play Bb, press "L" (lower) To play F#, press "R" (raise) To return the notes to natural B & F, press "N" Press C to take away the F & B bars (C Pentatonic). Press F to take away the E & B bars (F Pentatonic). Press G to take away the C & F bars (G Pentatonic). Press SPACE to put the bars back.
ALL credit goes to geyermusic. I just added code to ensure that this project would also switch to G-pentatonic when the "G key" is pressed (and a few other modifications). Thank you geyermusic for your amazingly useful Scratch project!