I added a little red to the original yellow mix used for colour 1 and began defining the sky. I had mixed up a lot of this colour, as after the next stage it will be the only colour used on this print. For each subsequent stage I am going to darken the mix using increasing amounts of purple. But first we need a little blue. This colour only appears at the top of the print so I only inked up this part of the block.
Stage 3 looks like this:
Now back to the orange mixed with a little purple.
Stage 4: