Construct a musical piece using the designated motif and sticking to the alphabetical form presented.
X:1
L:1/4
M:4/4
K:Bb
['D (D- [D-G]) [DG] [CFA] (B3/2 B/)', '(E/ F/)']  
X:1
L:1/4
M:4/4
K:Bb
 D | (D- [D-G]) [DG] [CFA] | (B3/2 B/) [CFA] [EA] | [DG] [DG] [CG] [EG] | [D^F]3 D | 
 D [DG] [EG] [EA] | [DB]3/2 [Dc]/ [DA] [Dd] | [Gc] [DB] [EA] [=EG] | D3 ||[K:G] (D/ C/) | 
 [B,D] [DB] [CA] [B,G] | [EG] [CE] [B,D] [A,D] | [B,G] ([CA]/ [DB]/) (E/ F/) (B/ A/) | [FA]3 [DA] | 
 [Dd]3/2 [Dc]/ [DB] [EB] | [Ee]3/2 [Ed]/ [Ec] (E/ F/) | G [GB] [Fd]3/2 [DF]/ | [DG]3 |]  