The draw() function can quickly become very long.
The way to avoid this is to create functions.
Functions can have any name but the name must be unique.
The new function here will be named drawCentralPoint()
The capital letters are used simply to make it easier to read.
Take care to spell it identically wherever the name is used.
Two existing lines of code are moved from draw()
to form the body of the new function definition.
A call to drawCentralPoint() is inserted into draw()
to replace the original two lines.
Be sure to add a ';' at the end of this call in draw()