In the square top right we were asked to choose complementary colours. I started by using 3 strands of each from stranded cotton but I found that the colours didn't mix as well as in the first square. When I had to rethread my needle I tried separating out all the strands and recombining before threading up. This gave a much better result. I also played with leaving the tails on the front at the start of each row. Usually this would feel too messy for my liking but I think the result is interesting.
The third square, bottom left, used a boucle type cotton in blue with fine pink silk to show 2 different weights. This was really hard to sew even though I swapped to my fattest sharp. Not an enjoyable bit of sewing!
Finally I added some shiny pink rayon to the ecru wool I used in my last sample. It probably looks a bit like toothpaste! It is not quite as effective as just the wool in my last challenge.