Okay! Hopefully at this point you've got your cast-on and first two plain rows down, so let's move on to the meat of things... double-knitting a decorative pattern!
(In this case, pawprints. It is the Pawprint Blankie, after all.)
Here's progress on the third (green side) row, knit up to the point where the pawprint pattern begins. This first part is the tips of the toes on a downward-facing pawprint.
Okay, we're knitting one of the 'facing' stitches, which are all still green at this point.
Loop the cream around instead of the green... hey! We're making a cream stitch on the facing side!
Now, bring the working yarns to the front for your next purl, which is paired with the knit stitch before it...
...and will, therefore, be worked with the green, ensuring that the same pattern shows up on both sides of the reversible fabric.
Look, your first pair of stitches in pattern! Keep working for a bit, and you'll start recognizing the pairs as you read your work.
If you look closely, you can see that there are four 'pattern' stitch pairs on the row being worked now. These are the tips of the toes.
Let me know if you have any more questions about the double-knitting process, and good luck!