pattern,Fill,A,1,0,1,34 ;there is a 1 bar A fill at bar 34
pattern,Fill,A,1,0,1,36 ;there is a 1 bar A fill at bar 36
pattern,Normal,A,8,2,8,2 ;there is 8 bars of A playing at bar 2
pattern,Normal,A,8,2,8,10 ;there is 8 bars of A playing at bar 10

Do you want to pattern out an existing drum track or just make a basic one up ?