Compose a 4-bar piece that follows the Ab_Ab7_Bmaj7_Ab:
PIECE_START TIME_SIGNATURE=4_4 GENRE=OTHER KEY=Ab BPM=98 CP=Ab_Ab7_Bmaj7_Ab BARLENGTH=4 INSTLIST=0_68_30_34
PIECE_START TIME_SIGNATURE=4_4 GENRE=OTHER KEY=Ab BPM=98 CP=Ab_Ab7_Bmaj7_Ab BARLENGTH=4 INSTLIST=0_68_30_34 TRACK_START INST=0 DENSITY=0 BAR_START BAR_END BAR_START BAR_END BAR_START BAR_END BAR_START BAR_END TRACK_END TRACK_START INST=68 DENSITY=1 BAR_START TIME_DELTA=2.0 NOTE_ON=51 TIME_DELTA=1.6 NOTE_OFF=51 TIME_DELTA=0.3999999999999999 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_ON=51 TIME_DELTA=10.0 NOTE_OFF=51 BAR_END BAR_START TIME_DELTA=14.0 NOTE_ON=61 NOTE_ON=56 TIME_DELTA=2.0 NOTE_OFF=61 NOTE_OFF=56 BAR_END BAR_START NOTE_ON=61 NOTE_ON=56 TIME_DELTA=1.6 NOTE_OFF=61 NOTE_OFF=56 TIME_DELTA=0.3999999999999999 NOTE_ON=60 NOTE_ON=54 TIME_DELTA=3.2 NOTE_OFF=60 NOTE_OFF=54 TIME_DELTA=0.7999999999999998 NOTE_ON=54 NOTE_ON=49 TIME_DELTA=4.0 NOTE_OFF=54 NOTE_OFF=49 NOTE_ON=51 NOTE_ON=54 TIME_DELTA=3.1999999999999993 NOTE_OFF=51 NOTE_OFF=54 TIME_DELTA=0.8000000000000007 NOTE_ON=56 NOTE_ON=51 TIME_DELTA=2.0 NOTE_OFF=56 NOTE_OFF=51 BAR_END BAR_START NOTE_ON=56 NOTE_ON=51 TIME_DELTA=14.4 NOTE_OFF=56 NOTE_OFF=51 BAR_END TRACK_END TRACK_START INST=30 DENSITY=4 BAR_START TIME_DELTA=2.0 NOTE_ON=51 NOTE_ON=51 TIME_DELTA=0.7999999999999998 NOTE_OFF=51 TIME_DELTA=0.20000000000000018 NOTE_ON=52 TIME_DELTA=0.7999999999999998 NOTE_OFF=52 TIME_DELTA=0.20000000000000018 NOTE_ON=51 TIME_DELTA=1.2000000000000002 NOTE_OFF=51 TIME_DELTA=0.39999999999999947 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_ON=49 NOTE_ON=61 NOTE_ON=56 NOTE_ON=44 NOTE_ON=61 NOTE_ON=44 NOTE_ON=49 NOTE_ON=56 TIME_DELTA=4.0 NOTE_OFF=61 NOTE_OFF=44 NOTE_OFF=49 NOTE_OFF=56 NOTE_ON=51 TIME_DELTA=3.1999999999999993 NOTE_OFF=51 TIME_DELTA=0.8000000000000007 NOTE_ON=56 TIME_DELTA=2.0 NOTE_OFF=49 NOTE_OFF=61 NOTE_OFF=56 NOTE_OFF=44 NOTE_OFF=56 BAR_END BAR_START NOTE_ON=56 NOTE_ON=56 TIME_DELTA=0.8 NOTE_OFF=56 TIME_DELTA=0.19999999999999996 NOTE_ON=57 TIME_DELTA=0.19999999999999996 NOTE_OFF=56 TIME_DELTA=0.6000000000000001 NOTE_OFF=57 TIME_DELTA=0.19999999999999996 NOTE_ON=56 NOTE_ON=51 TIME_DELTA=1.6 NOTE_OFF=56 TIME_DELTA=0.3999999999999999 NOTE_ON=49 TIME_DELTA=1.2000000000000002 NOTE_OFF=51 TIME_DELTA=0.39999999999999947 NOTE_OFF=49 TIME_DELTA=0.40000000000000036 NOTE_ON=48 NOTE_ON=54 TIME_DELTA=1.5999999999999996 NOTE_OFF=48 TIME_DELTA=0.40000000000000036 NOTE_ON=42 TIME_DELTA=1.5999999999999996 NOTE_OFF=42 TIME_DELTA=0.40000000000000036 NOTE_OFF=54 NOTE_ON=44 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 TIME_DELTA=0.40000000000000036 NOTE_ON=45 TIME_DELTA=1.1999999999999993 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_OFF=45 TIME_DELTA=0.40000000000000036 NOTE_ON=44 NOTE_ON=56 TIME_DELTA=2.0 NOTE_OFF=44 NOTE_OFF=56 BAR_END BAR_START NOTE_ON=44 NOTE_ON=56 TIME_DELTA=1.2 NOTE_OFF=56 TIME_DELTA=0.40000000000000013 NOTE_OFF=44 TIME_DELTA=0.3999999999999999 NOTE_ON=51 NOTE_ON=51 TIME_DELTA=0.7999999999999998 NOTE_OFF=51 TIME_DELTA=0.20000000000000018 NOTE_ON=52 TIME_DELTA=0.7999999999999998 NOTE_OFF=52 TIME_DELTA=0.20000000000000018 NOTE_ON=51 TIME_DELTA=1.2000000000000002 NOTE_OFF=51 TIME_DELTA=0.39999999999999947 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_ON=40 NOTE_ON=54 TIME_DELTA=4.0 NOTE_OFF=40 NOTE_OFF=54 NOTE_ON=47 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=47 TIME_DELTA=0.40000000000000036 NOTE_ON=52 TIME_DELTA=1.1999999999999993 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_OFF=52 TIME_DELTA=0.40000000000000036 NOTE_ON=56 NOTE_ON=56 TIME_DELTA=1.5999999999999996 NOTE_OFF=56 TIME_DELTA=0.40000000000000036 NOTE_OFF=56 BAR_END BAR_START NOTE_ON=56 NOTE_ON=56 TIME_DELTA=0.8 NOTE_OFF=56 TIME_DELTA=0.19999999999999996 NOTE_ON=57 TIME_DELTA=0.19999999999999996 NOTE_OFF=56 TIME_DELTA=0.6000000000000001 NOTE_OFF=57 TIME_DELTA=0.19999999999999996 NOTE_ON=56 NOTE_ON=51 TIME_DELTA=1.6 NOTE_OFF=56 TIME_DELTA=0.3999999999999999 NOTE_ON=49 TIME_DELTA=1.2000000000000002 NOTE_OFF=51 TIME_DELTA=0.39999999999999947 NOTE_OFF=49 TIME_DELTA=0.40000000000000036 NOTE_ON=48 NOTE_ON=54 TIME_DELTA=1.5999999999999996 NOTE_OFF=48 TIME_DELTA=0.40000000000000036 NOTE_ON=42 TIME_DELTA=1.5999999999999996 NOTE_OFF=42 TIME_DELTA=0.40000000000000036 NOTE_OFF=54 NOTE_ON=44 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 TIME_DELTA=0.40000000000000036 NOTE_ON=45 TIME_DELTA=1.1999999999999993 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_OFF=45 TIME_DELTA=0.40000000000000036 NOTE_ON=44 NOTE_ON=56 TIME_DELTA=2.0 NOTE_OFF=44 NOTE_OFF=56 BAR_END TRACK_END TRACK_START INST=34 DENSITY=3 BAR_START TIME_DELTA=2.0 NOTE_ON=51 TIME_DELTA=0.7999999999999998 NOTE_OFF=51 TIME_DELTA=0.20000000000000018 NOTE_ON=52 TIME_DELTA=0.7999999999999998 NOTE_OFF=52 TIME_DELTA=0.20000000000000018 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_ON=49 TIME_DELTA=8.0 NOTE_OFF=49 NOTE_ON=44 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 BAR_END BAR_START NOTE_ON=56 TIME_DELTA=0.8 NOTE_OFF=56 TIME_DELTA=0.19999999999999996 NOTE_ON=57 TIME_DELTA=0.8 NOTE_OFF=57 TIME_DELTA=0.19999999999999996 NOTE_ON=56 TIME_DELTA=1.6 NOTE_OFF=56 TIME_DELTA=0.3999999999999999 NOTE_ON=49 TIME_DELTA=1.5999999999999996 NOTE_OFF=49 TIME_DELTA=0.40000000000000036 NOTE_ON=48 TIME_DELTA=1.5999999999999996 NOTE_OFF=48 TIME_DELTA=0.40000000000000036 NOTE_ON=42 TIME_DELTA=1.5999999999999996 NOTE_OFF=42 TIME_DELTA=0.40000000000000036 NOTE_ON=44 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 TIME_DELTA=0.40000000000000036 NOTE_ON=45 TIME_DELTA=1.5999999999999996 NOTE_OFF=45 TIME_DELTA=0.40000000000000036 NOTE_ON=44 TIME_DELTA=2.0 NOTE_OFF=44 BAR_END BAR_START NOTE_ON=44 TIME_DELTA=1.6 NOTE_OFF=44 TIME_DELTA=0.3999999999999999 NOTE_ON=51 TIME_DELTA=0.7999999999999998 NOTE_OFF=51 TIME_DELTA=0.20000000000000018 NOTE_ON=52 TIME_DELTA=0.7999999999999998 NOTE_OFF=52 TIME_DELTA=0.20000000000000018 NOTE_ON=51 TIME_DELTA=1.5999999999999996 NOTE_OFF=51 TIME_DELTA=0.40000000000000036 NOTE_ON=40 TIME_DELTA=4.0 NOTE_OFF=40 NOTE_ON=47 TIME_DELTA=1.5999999999999996 NOTE_OFF=47 TIME_DELTA=0.40000000000000036 NOTE_ON=52 TIME_DELTA=1.5999999999999996 NOTE_OFF=52 TIME_DELTA=0.40000000000000036 NOTE_ON=56 TIME_DELTA=1.5999999999999996 NOTE_OFF=56 BAR_END BAR_START NOTE_ON=56 TIME_DELTA=0.8 NOTE_OFF=56 TIME_DELTA=0.19999999999999996 NOTE_ON=57 TIME_DELTA=0.8 NOTE_OFF=57 TIME_DELTA=0.19999999999999996 NOTE_ON=56 TIME_DELTA=1.6 NOTE_OFF=56 TIME_DELTA=0.3999999999999999 NOTE_ON=49 TIME_DELTA=1.5999999999999996 NOTE_OFF=49 TIME_DELTA=0.40000000000000036 NOTE_ON=48 TIME_DELTA=1.5999999999999996 NOTE_OFF=48 TIME_DELTA=0.40000000000000036 NOTE_ON=42 TIME_DELTA=1.5999999999999996 NOTE_OFF=42 TIME_DELTA=0.40000000000000036 NOTE_ON=44 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 TIME_DELTA=0.40000000000000036 NOTE_ON=45 TIME_DELTA=1.5999999999999996 NOTE_OFF=45 TIME_DELTA=0.40000000000000036 NOTE_ON=44 TIME_DELTA=1.5999999999999996 NOTE_OFF=44 BAR_END TRACK_END PIECE_END