def setup
  background(220)

  v1 = createVector(1, 2, 3)
  v2 = createVector(3, 2, 1)

  div = createDiv("#{P5Vector.dot(v1, v2)}")
  div.position(10, 10)
  div.style('font-size', '14px')
  div.style('width', '100px')
end