A wee bit o' art history time.
First, go to THIS PAGE in Safari.
You'll be able to listen to The Lonely Palette podcast about JMW Turner's painting, The Slave Ship there. You could, alternatively, pull up that podcast in the podcast app on your ipad and listen to it there. Maybe even subscribe from your ipad (hint hint).
While you are listening, sketch out the below painting in your sketchbook or in procreate. Feel free to use any color you want, but sketch up until the episode is over, but when all the extraneous talking and ad type things begin a few minutes before the end is when you can begin photographing/exporting and uploading your image.
Additionally, on your own time, you might find THIS interesting.