Prompt

Animate the 1933 Fort Dearborn stamp while strictly preserving its original green, flat-plate engraved artistic style. Do not add any new elements or change the scene. First, make the flag atop the wooden fort wave grandly in a brisk wind. Playfully make the big clouds drift quickly from right to left, while the fort itself stands resolute and still, adding a dramatic 3D parallax effect to the vintage vignette.