One master layout, six formats. The copy reflows, the artwork re-crops, and the whole set is hand-written HTML and CSS — no animation library, because 150 KB does not stretch to one.
Try the size list, or drag the corner of the responsive format: the layout switches from stacked to inline on its own, the same way it does in an ad slot.
Delivery
Google Ads, DV360, Adform. Backup JPG per format
Build
Hand-written HTML5 and CSS, 14 s loop, three cycles
Weight
112–148 KB per format, under 40 KB initial
