Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:6/8
K:F
['BBB AAA', 'F2 (3(F/A/c/) _e2 f e2 d c2']  
X:1
L:1/8
M:6/8
K:F
"^Mod.: time well-marked" (3F/G/A/ | BBB AAA | GAF D2 C | FFF AGF | G2 G G2 A | BBB AAA | 
 FAF D2 C | CDF AFG | F2 F F2 || (3(F/A/c/) | _e2 f e2 d | c2 c def | B2 B A2 A | G2 G GAF | 
 BBB AAA | FAF D2 C | FFF AFG | F2 F F2 ||  