|A wash of red and ochres on the roof with drips of blue, purple and yellow green|
|Another wide range of colours to represent the ancient knapped flint|
When the ochres and purples on the roof were still damp I dropped in some bright and quite opaque yellows and greens for the lychen.
For the flints, I can never decide on their colour, they are warm yet cool at the same time. So I had fun with three puddles of colours, a yellow ochre, a purple and a pink, then I dropped in some extras here and there mostly blues.
In the first image you can see the spots of blue mask that I had splashed around. Removing this once the wall was painted left me with some bright white flashes for the flint. I can always dull these down with another wash later and some shadows, if necessary.
Sky next!! It will be a greeny blue, to contrast all the purples.