Trying to fill a shape with alpha in clojurescript. Here’s my attempt that doesn’t work, what am I doing wrong?

(ns my.core
  (:require [quil.core :as q :include-macros true]
            [quil.middleware :as m]))

(defn setup []
  (q/frame-rate 30)
  {:graphic (q/create-graphics 500 500)})

(defn draw-state [state]
  (q/with-graphics (:graphic state)
    (q/background 240)
  	(q/fill 100 140 255 0.5)
  	(q/ellipse 100 100 100 100))
  (q/image (:graphic state) 0 0))

(q/defsketch my
  :host "host"
  :size [500 500]
  :setup setup
  :draw draw-state
  :middleware [m/fun-mode])