Colour 1: Chain 2 border st + (6×12-small) (7×12-large) + 3 st for other border + 1 join st & join in the round.
Ch 1 & dc in join st then dc TPG. Slip in join st by pulling 2nd colour through.
Colour 2: DC TPG as above
C1: dc in back loops TPG
C2: dc in back loops TPG
C1: follow pattern on chart for where to tb into row below.