Create a loopable gif animation of a DNA strand

I would like someone to create a gif/animation of a DNA strand with two single parent strands intertwining into a double helix DNA structure. The animation is for a business analogy, and so the individual strands need to be named after various qualities the business will adhere to, these will be provided to the awarded freelancer. The gif should be similar to this but in reverse.... [login to view URL] The backbone (the long vertical structure of DNA) should be black, and the pairs (the connecting links between the two vertical backbones) should be alternating grey and turquoise (RGB colour info attached). Simplicity is key whilst also looking sharp and clean please. The produced animation needs to be small enough in size to be loaded relatively quickly on a website/mobile device, it should last 3-5 seconds. Thanks