Do you mean a default dark theme for the app itself or for the Thunkable platform? I think there should be a way to create a custom dark theme but I haven’t seen any examples of this yet.
Sorry, I asked the wrong question. What I really wanted to ask is, why does the timer use a minimum delay of 1? This is usually done to get the maximum possible speed, for example, when programming games. Try my example on device to see the problem clearly.