Wow

    ld hl, waterAnims
    ld de, $0000
    ld a, [rAnimFrame]
    sla a
    sla a
    sla a
    sla a
    ld e, a
    add hl, de
    ld de, $8000+(9*16)
    ld bc, 16
    call loadTiles

    ld hl, lavaAnim
    ld de, $0000
    ld a, [rAnimFrame]
    sla a
    sla a
    sla a
    sla a
    ld e, a
    add hl, de
    ld de, $8000+(13*16)
    ld bc, 16
    call loadTiles

    ld a, [rTimeToNextFrame]
    dec a
    ld [rTimeToNextFrame], a
    cp $00
    jr nz, .dontGoToNextFrame
    ld a, $07
    ld [rTimeToNextFrame], a
    ld a, [rAnimFrame]
    inc a
    cp $04
    jr nz, .dontResetAnimFrame
    ld a, $00
.dontResetAnimFrame:
    ld [rAnimFrame], a
.dontGoToNextFrame