Seriously and p5serial

Hi to everyone,
I am new here and i have not much experience in coding.
I have a problem whit seriously.js library: i’ve copied the sketch from D. Shiffman tutorial about the library and then i’ve tried to change some values like blur.amount from a sensor.
The sketch works well but i can’t send the sensor values to the blur.amount becouse the object and has been created in setup.