Repetition.....

Repetition is the re-use of words and phrases purposefully. It is used to emphasize an idea.

Example:
    1. Half a league, half a league,
       Half a league
    onwards
    This creates the visual image of marching soldiers to the forward

    2. Cannon to right of them
       Cannon to left of them
       Cannon in front of them
    (Charge of the Light Brigade)

    The repetition of “cannons” emphasizes the fatal situation and the attack.

    3. sans teeth, sans eyes, sans taste (The seven ages of man)

    Repetition of 'sans' emphasizes the pathetic condition of older people.