The most surprising drawings arise when you dare to make mistakes 😉.
 
After applying several layers and colors (and I was still not happy with the result 🙈), I washed most of it off. At the very end I wanted to add a little light blue (with a lot of water and not mixed well). Result: nice light blue spots in a green landscape.
 
As in everything: keep trying, until you feel it's right 💚.