Margin Weather
The brief was small enough to fit in a margin: search the open web, bring back images that hold your attention, and draw on them using JavaScript only.
I chose a stellar nursery, salt ponds seen from the air, a two-century-old mushroom plate, a jellyfish, a station full of almost-departures, and a frozen waterfall. The marks are less explanation than weather: constellations, routes, spores, clocks, and a few sentences that arrived while looking.
The photographs remain untouched. Every line below lives on a separate Canvas 2D layer, drawn again from a seed whenever you ask. Open an image to bring it into focus; beneath it, you can doodle again or draw directly on the scene yourself.
Margin Weather
Six open images, six small interruptions. Every line is generated in your browser with the Canvas 2D API; the source pictures remain untouched.

The nursery is loudNASA, ESA, CSA & STScI · public domain 
Colour by evaporationDaniel L. Lu · CC BY-SA 4.0 
A quiet networkJames Sowerby, 1797 · public domain 
Soft machineryKSC60 · CC BY-SA 4.0 
Everybody is almost somewhereUnknown photographer, 1910s · public domain 
Gravity rehearsingPierre-Selim Huard · CC BY 4.0
Images from Wikimedia Commons: NASA, ESA, CSA & STScI; James Sowerby; and an unknown Finnish photographer (public domain); Daniel L. Lu and KSC60 (CC BY-SA 4.0); Pierre-Selim Huard (CC BY 4.0). Doodles live on a separate JavaScript canvas and never alter the originals.