x% = 38
y% = 126
PRINT x%, y%
DO
    y% = y% - x% * (y% \ x%)
    PRINT x%, y%
    IF (y% = 0) THEN STOP
    x% = x% - y% * (x% \ y%)
    PRINT x%, y%
    IF (x% = 0) THEN STOP
LOOP
STOP
END