I wrote a code that works, the only thing I$\text{'}$m struggling with $-$ reorganizing it in Model$-$View$-$Controller design. It should be written in Python in Processing. Help me$,$ please.

Figure $3$: Canvas after typing the digits $42$ and then again after clicking the mouse.

Hint $1$: Assuming that digit$\_$string contains digits typed in by the user, you can use the following line of

code to convert the string data to integer data:

number $=$ int$($digit$\_$string$)$

Hint $2$: To use good Model$-$View$-$Controller design, both the digit string AND the current message will

need to be separate variables in your model!