How to create a circular button with Khan Academy's JS "variation"?

Hi SciBlazeMaker.

Making a circle button on KA is actually easier than a rectangle one!

here's my code:

ellipse( buttonX, buttonY, buttonSize,buttonSize); // button

mouseClicked = function (){

if(dist(mouseX,mouseY,buttonX,buttonY) <= buttonSize / 2)

{

//do something.

}

};

in this you use the dist() function, which calculates the distance between the point made by the first two parameters and the point made by the last two parameters.

Hope this helps!