First install leiningen, then
git clone git@github.com:AKST/svg-demo.git
cd svg-demo
lein deps
lein figwheel
A clojure repl will appear, run (in-ns 'svg-thing.core) to go into the appropiate namespace, then you can change the light and temperature like so.
(swap! app-state assoc-in [:light :explict] 0)
(swap! app-state assoc-in [:light :explict] 100)
(swap! app-state assoc-in [:temp :explict] 20)
(swap! app-state assoc-in [:temp :explict] 60)