* https://code.activestate.com/recipes/579048-python-mandelbrot-fractal-with-tkinter/
* https://stackoverflow.com/questions/9886274/how-can-i-convert-canvas-content-to-an-image
* https://tkdocs.com/tutorial/text.html
* https://stackoverflow.com/questions/33084097/tkinter-really-all-complete-event-list
* https://stackoverflow.com/questions/4172659/master-list-of-all-tkinter-events
* https://www.tcl.tk/man/tcl8.5/TkCmd/bind.htm#M7