Compose a melodic line that follows the given chord progression.
'D', 'A7', 'D', 'D', 'D7', 'G', 'E7', 'D', 'B7', 'Em', 'A7', 'D', 'Bm', 'E7', 'A', 'Bm', 'G', 'E7', 'D', 'B7', 'E7', 'A7', 'D'  
X:1
L:1/8
M:2/2
K:D
 afa |"D" e2 d2 c2 B2 | A4 z afa | e2 d2 c2 B2 |"A7" c4 z afa | e2 d2 c2 B2 | c4 z a^ga | 
 ba^ga bafd |"D" A4 z afa |"D" e2 d2 c2 B2 | A4 z afa |"D7" e2 d2 c2 d2 |"G" B6 Bc | 
 d2 cd"E7" e2 de |"D" f2 =ef"B7" b2 f2 |"Em" a2 g2"A7" gABc |"D" d4 z2 c2 || |"Bm" B3 c dcde | 
 f b2 f b2 fb | f b2 f b2 fb | f b2 f"E7" b4 |"A" A3 B cAce | a3 a2 Bce | a3 a2 Bce | a^gab a=gfe | 
"Bm" B3 c dcde | f b2 f b2 fb | f b2 f b2 fb | f b2 f b2 c'2 |"G" d'4"E7" d'fg^g | 
"D" a^gab"B7" afde |"E7" fafd"A7" egec |"D" d4 z |]  