dents as a more detailed example using a conventional practice of two yarns being passed through each reed dent the above explicit example would be as follows that is starting at one end of the reed 16 reed dents are occupied by 32 white yarns conventionally reeded in pairs to form the first number in numerical sequence 1 this group of yarns is followed by a second yarn group consisting of four black yarns which are reeded into two dents and which define the first number in numerical sequence 2 18 white yarns are then reeded in the same manner to form the second number defining numerical sequence 1 followed by 8 black yarns second number in sequence 2 24 white yarns third number in sequence 1 10 black yarns third number in sequence 2 and so forth weaving white weft yarns into warp yarns arranged in this manner will produce a black and white striped pattern as shown in fig2 this pattern of stripes is not random but has a correlation of a 1 f fluctuation in another example to obtain a different striped pattern with a 1 f fluctuation white warp yarns can be grouped in accordance with a numerical sequence having a 1 f fluctuation while a constant number of black yarns for example 5 yarns are grouped the groups are then alternated as described above in this case the variation in the width of the white stripes has a 1 f fluctuation alternatively white yarn and black yarn can each be grouped in accordance with a common numerical sequence for example white yarns and black yarns can be allocated in accordance.