Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/2
K:D
['dB AFdB', 'defg abaf']  
X:1
L:1/8
M:2/2
K:D
 dB | AFdB AFDF | AFdB A2 dB | AFdB ABde | fedf e2 dB | AFdB AFDF | AFdB A2 de | faaf gece | 
 dBAF D2 z2 || defg abaf | gage abaf | defg abaf | bgaf e2 d2 | defg a2 af | bagb a2 af | 
 gfeg f2 dc | egfd efdB ||  