Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:F
['cdcB A2 A2 cBAB']  
X:1
L:1/8
M:4/4
K:F
 cdcB A2 A2 | cBAB c2 fd | cdcB A2 A2 | cBAB c4 | A3 ccBdB | G3 BAcfc | A3 cdcBA | GFGA F4 |]  