Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
Q:1/8=340
M:12/8
K:Emin
['EGA B2 B E2 A B3 e2', 'f2 d']  
X:1
L:1/8
Q:1/8=340
M:12/8
K:Emin
"^Slide" EGA B2 B E2 A B3 | e2 B d2 B cBA BAG | EGA BAB edB e3 | gfe fed ABd e3 :| 
 g2 e f2 d A2 B G2 E | gfe f2 d ABd e3 | gfe f2 d GAB G2 E | def efg f2 d e3 :|  