Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:Bb
['|{^c} d- d7- d2 cB']  
X:1
L:1/8
M:4/4
K:Bb
{^c} dB |{^c} d- d7- | d2 cB cdB{^F}G- | G D3- D4- | D4{^c} (3d2 =c2 B2 |{^B} c- c7- | 
 c2 BG Bc B2 |{^G} A- A7- | A2 (3G,BD GABc |{^c} d- d7- | d2 cB cdB{^c}G- | G D3- D4- | D8 | 
 F2 DF G B3 |{c} _d c3- cBGF |{^F} G- G7- | G6 |]  