Make a language mode that doesn't open a separate window,
but displays the "current bitmap" in the repl.
Notes:
the update loop should be disabled (as default)
only display the bitmap, when a drawing function is called
[or simply compare the bitmap before and after each evaluation to see whether
it needs to be displayed in the repl again]
alternativ: a plugin for DrRacket could have a static canvas to draw on
Idea:
Make a language mode that doesn't open a separate window, but displays the "current bitmap" in the repl.
Notes: