Compose a 4-bar piece that follows the G_F6_C_Em_F:
PIECE_START TIME_SIGNATURE=4_4 GENRE=OTHER KEY=C BPM=64 CP=G_F6_C_Em_F BARLENGTH=4 INSTLIST=0_73_18_35
PIECE_START TIME_SIGNATURE=4_4 GENRE=OTHER KEY=C BPM=64 CP=G_F6_C_Em_F BARLENGTH=4 INSTLIST=0_73_18_35 TRACK_START INST=0 DENSITY=3 BAR_START NOTE_ON=67 NOTE_ON=71 NOTE_ON=62 NOTE_ON=43 TIME_DELTA=3.5 NOTE_OFF=43 TIME_DELTA=0.5 NOTE_ON=35 TIME_DELTA=1.5 NOTE_OFF=67 NOTE_OFF=71 NOTE_OFF=62 TIME_DELTA=0.5 NOTE_ON=67 NOTE_ON=62 NOTE_ON=71 TIME_DELTA=1.5 NOTE_OFF=35 NOTE_OFF=67 NOTE_OFF=62 NOTE_OFF=71 TIME_DELTA=0.5 NOTE_ON=69 NOTE_ON=65 NOTE_ON=60 NOTE_ON=41 TIME_DELTA=3.5 NOTE_OFF=69 NOTE_OFF=65 NOTE_OFF=60 NOTE_OFF=41 TIME_DELTA=0.5 NOTE_ON=60 NOTE_ON=41 TIME_DELTA=0.75 NOTE_OFF=60 TIME_DELTA=0.25 NOTE_ON=65 TIME_DELTA=0.5 NOTE_OFF=41 TIME_DELTA=0.25 NOTE_OFF=65 TIME_DELTA=0.25 NOTE_ON=69 NOTE_ON=38 TIME_DELTA=0.75 NOTE_OFF=69 TIME_DELTA=0.25 NOTE_ON=65 TIME_DELTA=0.5 NOTE_OFF=38 TIME_DELTA=0.25 NOTE_OFF=65 BAR_END BAR_START NOTE_ON=67 NOTE_ON=64 NOTE_ON=60 NOTE_ON=36 TIME_DELTA=3.5 NOTE_OFF=67 NOTE_OFF=64 NOTE_OFF=60 TIME_DELTA=0.5 NOTE_ON=60 TIME_DELTA=1.5 NOTE_OFF=60 TIME_DELTA=0.5 NOTE_ON=55 TIME_DELTA=1.5 NOTE_OFF=36 NOTE_OFF=55 TIME_DELTA=0.5 NOTE_ON=60 NOTE_ON=48 TIME_DELTA=1.5 NOTE_OFF=48 TIME_DELTA=0.5 NOTE_ON=43 TIME_DELTA=1.5 NOTE_OFF=60 NOTE_OFF=43 TIME_DELTA=0.5 NOTE_ON=67 NOTE_ON=48 TIME_DELTA=0.75 NOTE_OFF=67 TIME_DELTA=0.25 NOTE_ON=69 TIME_DELTA=0.5 NOTE_OFF=48 TIME_DELTA=0.25 NOTE_OFF=69 TIME_DELTA=0.25 NOTE_ON=72 NOTE_ON=43 TIME_DELTA=0.75 NOTE_OFF=72 TIME_DELTA=0.25 NOTE_ON=74 TIME_DELTA=0.5 NOTE_OFF=43 TIME_DELTA=0.25 NOTE_OFF=74 BAR_END BAR_START NOTE_ON=76 NOTE_ON=40 TIME_DELTA=3.5 NOTE_OFF=76 TIME_DELTA=0.5 NOTE_ON=71 TIME_DELTA=1.5 NOTE_OFF=71 TIME_DELTA=0.5 NOTE_ON=67 NOTE_ON=64 TIME_DELTA=3.5 NOTE_OFF=40 TIME_DELTA=0.5 NOTE_ON=40 TIME_DELTA=1.5 NOTE_OFF=67 NOTE_OFF=64 NOTE_OFF=40 TIME_DELTA=0.5 NOTE_ON=76 NOTE_ON=48 TIME_DELTA=0.75 NOTE_OFF=76 TIME_DELTA=0.25 NOTE_ON=71 TIME_DELTA=0.5 NOTE_OFF=48 TIME_DELTA=0.25 NOTE_OFF=71 TIME_DELTA=0.25 NOTE_ON=67 NOTE_ON=43 TIME_DELTA=1.5 NOTE_OFF=67 NOTE_OFF=43 BAR_END BAR_START NOTE_ON=69 NOTE_ON=41 TIME_DELTA=1.5 NOTE_OFF=69 TIME_DELTA=0.5 NOTE_ON=60 TIME_DELTA=1.5 NOTE_OFF=60 TIME_DELTA=0.5 NOTE_ON=57 TIME_DELTA=1.5 NOTE_OFF=57 TIME_DELTA=0.5 NOTE_ON=60 TIME_DELTA=1.5 NOTE_OFF=60 TIME_DELTA=0.5 NOTE_ON=57 TIME_DELTA=1.5 NOTE_OFF=57 TIME_DELTA=0.5 NOTE_ON=60 TIME_DELTA=1.5 NOTE_OFF=41 NOTE_OFF=60 TIME_DELTA=0.5 NOTE_ON=69 NOTE_ON=41 TIME_DELTA=0.75 NOTE_OFF=69 TIME_DELTA=0.25 NOTE_ON=67 TIME_DELTA=0.5 NOTE_OFF=41 TIME_DELTA=0.25 NOTE_OFF=67 TIME_DELTA=0.25 NOTE_ON=65 NOTE_ON=42 TIME_DELTA=0.75 NOTE_OFF=65 TIME_DELTA=0.25 NOTE_ON=60 TIME_DELTA=0.5 NOTE_OFF=42 TIME_DELTA=0.25 NOTE_OFF=60 BAR_END TRACK_END TRACK_START INST=73 DENSITY=2 BAR_START TIME_DELTA=2.0 NOTE_ON=62 TIME_DELTA=2.0 NOTE_OFF=62 NOTE_ON=62 TIME_DELTA=1.0 NOTE_OFF=62 TIME_DELTA=1.0 NOTE_ON=64 TIME_DELTA=2.0 NOTE_OFF=64 NOTE_ON=65 TIME_DELTA=2.0 NOTE_OFF=65 NOTE_ON=64 TIME_DELTA=1.0 NOTE_OFF=64 NOTE_ON=62 TIME_DELTA=2.0 NOTE_OFF=62 NOTE_ON=60 TIME_DELTA=3.0 NOTE_OFF=60 BAR_END BAR_START TIME_DELTA=3.0 NOTE_ON=64 TIME_DELTA=1.0 NOTE_OFF=64 NOTE_ON=64 TIME_DELTA=2.0 NOTE_OFF=64 NOTE_ON=62 TIME_DELTA=2.0 NOTE_OFF=62 NOTE_ON=64 TIME_DELTA=2.0 NOTE_OFF=64 NOTE_ON=62 TIME_DELTA=1.0 NOTE_OFF=62 NOTE_ON=64 TIME_DELTA=3.0 NOTE_OFF=64 NOTE_ON=67 TIME_DELTA=2.0 NOTE_OFF=67 BAR_END BAR_START NOTE_ON=67 TIME_DELTA=2.0 NOTE_OFF=67 TIME_DELTA=2.0 NOTE_ON=71 TIME_DELTA=3.0 NOTE_OFF=71 NOTE_ON=67 TIME_DELTA=1.0 NOTE_OFF=67 NOTE_ON=69 TIME_DELTA=5.0 NOTE_OFF=69 NOTE_ON=67 TIME_DELTA=1.0 NOTE_OFF=67 NOTE_ON=69 TIME_DELTA=1.0 NOTE_OFF=69 NOTE_ON=71 TIME_DELTA=1.0 NOTE_OFF=71 BAR_END BAR_START NOTE_ON=71 TIME_DELTA=1.0 NOTE_OFF=71 NOTE_ON=72 TIME_DELTA=3.0 NOTE_OFF=72 TIME_DELTA=3.0 NOTE_ON=69 TIME_DELTA=1.0 NOTE_OFF=69 NOTE_ON=72 TIME_DELTA=3.0 NOTE_OFF=72 TIME_DELTA=1.0 NOTE_ON=76 TIME_DELTA=2.0 NOTE_OFF=76 NOTE_ON=74 TIME_DELTA=2.0 NOTE_OFF=74 BAR_END TRACK_END TRACK_START INST=18 DENSITY=1 BAR_START NOTE_ON=79 NOTE_ON=83 NOTE_ON=74 TIME_DELTA=5.5 NOTE_OFF=79 NOTE_OFF=83 NOTE_OFF=74 TIME_DELTA=0.5 NOTE_ON=79 NOTE_ON=74 NOTE_ON=83 TIME_DELTA=1.5 NOTE_OFF=79 NOTE_OFF=74 NOTE_OFF=83 TIME_DELTA=0.5 NOTE_ON=81 NOTE_ON=77 NOTE_ON=72 TIME_DELTA=3.5 NOTE_OFF=81 NOTE_OFF=77 NOTE_OFF=72 BAR_END BAR_START NOTE_ON=79 NOTE_ON=76 NOTE_ON=72 TIME_DELTA=3.5 NOTE_OFF=79 NOTE_OFF=76 NOTE_OFF=72 BAR_END BAR_START TIME_DELTA=6.0 NOTE_ON=79 NOTE_ON=76 TIME_DELTA=5.5 NOTE_OFF=79 NOTE_OFF=76 BAR_END BAR_START BAR_END TRACK_END TRACK_START INST=35 DENSITY=1 BAR_START NOTE_ON=31 TIME_DELTA=3.5 NOTE_OFF=31 TIME_DELTA=0.5 NOTE_ON=23 TIME_DELTA=3.5 NOTE_OFF=23 TIME_DELTA=0.5 NOTE_ON=29 TIME_DELTA=3.5 NOTE_OFF=29 TIME_DELTA=0.5 NOTE_ON=29 TIME_DELTA=1.5 NOTE_OFF=29 TIME_DELTA=0.5 NOTE_ON=26 TIME_DELTA=1.5 NOTE_OFF=26 BAR_END BAR_START NOTE_ON=24 TIME_DELTA=7.5 NOTE_OFF=24 TIME_DELTA=0.5 NOTE_ON=36 TIME_DELTA=1.5 NOTE_OFF=36 TIME_DELTA=0.5 NOTE_ON=31 TIME_DELTA=1.5 NOTE_OFF=31 TIME_DELTA=0.5 NOTE_ON=36 TIME_DELTA=1.5 NOTE_OFF=36 TIME_DELTA=0.5 NOTE_ON=31 TIME_DELTA=1.5 NOTE_OFF=31 BAR_END BAR_START NOTE_ON=28 TIME_DELTA=9.5 NOTE_OFF=28 TIME_DELTA=0.5 NOTE_ON=28 TIME_DELTA=1.5 NOTE_OFF=28 TIME_DELTA=0.5 NOTE_ON=36 TIME_DELTA=1.5 NOTE_OFF=36 TIME_DELTA=0.5 NOTE_ON=31 TIME_DELTA=1.5 NOTE_OFF=31 BAR_END BAR_START NOTE_ON=29 TIME_DELTA=11.5 NOTE_OFF=29 TIME_DELTA=0.5 NOTE_ON=29 TIME_DELTA=1.5 NOTE_OFF=29 TIME_DELTA=0.5 NOTE_ON=30 TIME_DELTA=1.5 NOTE_OFF=30 BAR_END TRACK_END PIECE_END