Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/4
K:F
['CG, A, z (CA,) (CA,) ||[M:3/4] F,B,', ':|[M:7/8] F,2 B,A,F,']  
X:1
L:1/8
M:2/4
K:F
 CG, A, z | (CA,) (CA,) ||[M:3/4] F,B, A,F, F, z | F,2 B, z/ F,/ F,2 :|[M:7/8] F,2 B,A,F, F,2 :| 
[M:7/8] z F,-F,B,(A,F,)F, :|[M:7/8] z F,B,(A,F,)F, z :|[M:7/8] F,2 B,A,F, F,2 :|  