The pattern is written for three different colours. However, you can use more. One chart repeat uses 1-2 g of yarn for both the background colour and the serpentine.

Pattern features:
• knitted toe-up
• four sizes (60/66/72/78 sts)
• colourwork
• short-row-heel
• the length of both the leg and the foot is easy to adjust
• pattern is written for 2 circular needles, but you can use DPNs or magic loop as well

Many thanks to tiinaq, hautecontre and knittingall for test knitting and proofreading.