I had to go fast to catch this at all. I happened to look up as the sun was casting a warm light on the buildings opposite, before it ducked down below the hill.
I have a few bits and pieces set up on a small table which I leave there in case inspiration hits! So without any drawing I went for the water and sloshed it into the warm colours to begin the buildings, sky and then sea. It truly was a 5 minute effort because after that it was all over.
It was just all more in shadow then, but I decided not to do more. Also decided not to add any black lines either. Not a bad way to paint actually, and you don’t have time to worry about it not working, because it’s almost done before you know it. You can worry later if you must.