Is there a function in Processing JS to change the color of the mouse cursor?

I have been trying to make a Processing JS drawing program on Khan Academy, where the mouse cursor changes when it clicks on the color option and only color on the drawing space based on selected color and size. And only color if it's clicked or moved clicked but only in the drawing space. But... is there a way to change the mouse cursor and only draw when the functions rules applies and where it would apply?