Anyway, with no students around it is time to finish off some bits and pieces, and this one came to the top. Unfortunately I have very few acrylic paints, and the colours I require I suspect I gave to my student. The fact that I can't locate my on-site photos isn't helping greatly either!
So this is what you can do with yellow, pale green, bright blue and terracotta. But I am going to have to locate some real red, and some white, if I am to finish this.
The story so far, after about an hour today getting "back into the painting" with some loose brushwork: