def setup
  noStroke
  colorMode(RGB, 100)
  (0...100).each do |i|
    (0...100).each do |j|
      stroke(i, j, 0)
      point(i, j)
    end
  end
end

def setup
  noStroke
  colorMode(HSB, 100)
  (0...100).each do |i|
    (0...100).each do |j|
      stroke(i, j, 100)
      point(i, j)
    end
  end
end

def setup
  background(220)
  colorMode(RGB, 255)
  c = color(127, 255, 0)
  colorMode(RGB, 1)
  myColor = red(c)
  text(myColor, 10, 10, 80, 80)
end

def setup
  noFill
  colorMode(RGB, 255, 255, 255, 1)
  background(250)
  strokeWeight(4)
  stroke(255, 0, 10, 0.3)
  ellipse(40, 40, 50, 50)
  ellipse(50, 50, 40, 40)
end