MainLoop:

.framewait:
    bit PPUSTATUS
    bpl .framewait

    lda PPUSTATUS
    lda #$3F
    sta PPUADDR
    lda #$00
    sta PPUADDR
    lda #$12
    sta PPUDATA

.secondframe:
    bit PPUSTATUS
    bpl .secondframe

    lda #$16
    sta PPUDATA

.thirdframe:
    bit PPUSTATUS
    bpl .thirdframe

    lda #$1A
    sta PPUDATA

    iny
    jmp MainLoop