About the DNA effect
DNA renders a vertical double helix. Each row places two strands, one marked A and one marked T, at positions given by two sine waves exactly half a turn apart, so the strands wind around each other as they run down the screen. On every second row the gap between the strands is filled with dashes, drawing the base-pair rungs of the ladder. As time advances, the phase shifts and the helix appears to rotate in place, with rungs shrinking to nothing where the strands cross and stretching wide at the outer edges. It is an instantly recognisable science motif built from nothing but letters and dashes. Use it for biology, biotech, health or education projects, or for a science-fair poster. Cyan and green feel clinical and digital; pink and purple are friendlier for outreach and classroom material.