Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
Q:1/4=180
M:4/4
K:F
['z2 [AF]2', '[cA]2 [dB]2 z [dB] [dB]2 [dB]2 [dB][cA][dB][ec]'  
X:1
L:1/8
Q:1/4=180
M:4/4
K:F
 z2 [AF]2 [BG]2 [cA]2 |: [dB]2 z [dB] [dB]2 [dB]2 | [dB][cA][dB][ec] [dB][cA] [BG]2 | 
 [cA]2 z [cA] [cA]2 [cA]2 | [cA][BG][cA][dB] [cA][BG] [AF]2 | [BG]2 z [BG] [BG]2 [BG]2 | 
 [BG][AF][BG][cA] [BG][AF] [GE]2 | [ec]2 [dB]2 [cA]2 [BG]2 | [AF]3 [AF] [AF][BG][cA][dB] | 
 [cA]4 [BG][cA] [BG]2 |1 [AF]4 [BG]2 [cA]2 :|  