dw .frame1
dw .frame2
dw .frame3
dw .frame4
.frame1
db $00 ; bitmask
db $19
.frame2
db $01 ; bitmask
db $1a
.frame3
db $02 ; bitmask
db $1b
.frame4
db $03 ; bitmask
db $1c, $1d, $1e, $1f
; 0xd9a72