Four gene annotations slide horizontally into position along two tracks, with forward-strand genes in olive on the top track and reverse-strand genes in burgundy below. Each rectangle fades in and glides from an offset starting point to its genomic start coordinate over 1.5 seconds, staggered by one-second delays, then gene name labels fade in after four seconds. The visualization uses d3.v4 selections, data joins, and the transition method with duration and delay attributes, rendering as SVG with a fixed 1000×400 canvas.