double helix dna scarf

My brother is a scientist this means that always i have to make scarves which have mathematical formulas behind them like my mobius scarf from Christmas he now has me making a double helix scarf which is a cable scarf which represents the dna pattern of our bodies.

the scarf is going well and as its a birthday present ive beaded the initial of her name Emily into the beginning if the scarf to make it special.