CLEAR X
INCREASE X
INCREASE X
INCREASE X

PRINT X

CLEAR A
REPEAT X TIMES (
    CLEAR B
    REPEAT X TIMES (
        INCREASE B
    )
    REPEAT B TIMES (
        INCREASE A
    )
)

CLEAR B
REPEAT A TIMES (
    INCREASE B
)

PRINT B

CLEAR C
REPEAT B TIMES (
    INCREASE C
)
REPEAT X TIMES (
    INCREASE C
)

PRINT C