Paris Images Live

How to use my heater in Paris?

I live in an apartment in Paris and I have a small heater (atlantic electronic)
it has 3 buttons one that has a clock’s image on it(not a clock just image), one that has a sun’s image on it, one that has a nights moons image on it and a switch off button. And also it has a button that you can turn it from 1 to 7 and thats propably the volume. And thats all!
How can I organise it to start in the morning? lets say 5am…

Thanks in advance…
Mike
It has to be 1 button pressed at a time…