This is a scarf that I made for my son.
It started with the realization that I have never knitted with more than one colour on a row. So I decided to make a rainbow scarf with a three square pattern, a small one, a medium one and a large one – each time doubling in size and cycling through the colours of the rainbow (red, orange, yellow, green. blue, indigo and violet).
The pattern is here
rainbow scarf pattern instructions