Compose a musical piece utilizing the given motif as the foundation while maintaining the required musical form.
X:1
L:1/8
M:6/4
K:C
['G2 F2 E2 GcAF']  
X:1
L:1/8
M:6/4
K:C
 GEcAGA G2 F2 E2 | GcAF G2 D2 C2 GEcAGA G2 F2 E2 | GcAF G2 D2 C2 | z4 DE | F2 D2 EF | G2 E2 DE | 
 F2 D2 EF | G2 E2 z2 GEcA G2 F2 E2 | GcAF E2 D2 C2 |]  