Triskele Pattern in Double or Two-Sided Knitting
Assuming that you know how to do double knitting, this pattern is very easy. I cast on 52 stitches, with both colours held together. If you're new to the technique it might help if you sort the stitches before starting to work the first row, i.e. when you follow the pattern and work one colour for each side (RS and WS), you sort them into alternating stitches of purple and multi-colour (or whatever colours you're using for your potholder). You can use any cast-on you like - but remember that you have to cast on for both sides in one step - so if you cast-on with separate colours, you need to double the stitch number! And make sure that you cross the yarns, otherwise the lower edge might not be "closed"!
I also knit the first and last stitch of each row with both colours, to make sure that the edges are "closed". and I worked a normal cast-off, again with both colours together. I used the leftover thread to crochet a loop; a few chain stitches, one slip stitch into the base to form the loop and a row of single crochet over the chain stitches. Simple, but dense and thick enough to avoid burned fingers:)
To end up with a square, I worked 4 rows in single colour before I started the pattern and 4 rows again after I finished the pattern. I added 2 stitches in main colour on each side, plus the two edge stitches, worked with both threads together (52 sts).
With double knitting you can work following a chart, or you could count the stitches for each colour and write just numbers, like this:
1. Row: W - 6, [3,2] 7 times, 3, 6
2. Row: B - 5, 2, [1,2,1,1] 7 times, 1, 2, 5
and so on...
I used W for white and B for black, which means that the first stitch (after the edge stitch) is knitted in "White" (or black for the other side). But if you always knit the first stitch of the row in the main colour (i.e. the knit stitches on this side), you can skip this, because the colour sequence will be obvious for the rest.
I also put my pattern into a plastic cover or laminate it, so that I can mark off where I am in the pattern. I can wipe it clean again for the 2nd potholder. and before I start knitting I put the number of stitches into the pattern, where there are more than 5 of the same colour. I can see up to 5 sts well enough without counting, but after that I have to stop my knitting and start counting squares otherwise.
(The chart above has a few empty rows/stitches around the main pattern. Disregard those, they are not the same on each side, because I cut out the picture from my pdf file unevenly!)
The pattern is free for personal use, but not for commercial purposes.