[ibvkryot] Toy computer output

Output modes for a toy computer:

1. Text
2. Indented text
3. Raster graphics
4. Vector graphics, with touchscreen zoom
5. 3D graphics as a triangle mesh. Touchscreen to rotate the object
6. Animation, reactive to keystrokes to display the next frame
7. Animation as a generated movie, playing no faster than the specified frame rate, but possibly slower if the frames don't get generated fast enough
8. Sound waveform
9. MIDI

Such a toy computer can be mocked up by software running on a regular computer.