Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/8
M:4/4
K:F
['GA BG']  
X:1
L:1/8
M:4/4
K:F
 CC | C2 FF F2 EF | GA BG A4 |[M:3/4] c2 GA BG | c2 GA BG | c2 GA BG | c2 GA BG | c2 GA BG | 
 c2 GA BG | c2 GA BG | c4 (d =B3) | c6 |[M:3/4] z2 | (cB) AG F2 | B2 D2 F2 |[M:4/4] (GF) ED C2 AB | 
 c2 (dB) AF G2 | F4- F z ||  