hey guys. please, I'm stuck here and this is for a project I'm doing. Can anyone please post a code example so that I can try to understand and use it?

What I do is to have a hidden property in my button class and a button.display() method to display the button. If I add several lines to make the four button hidden in setup() and then enable them(hidden=false) once the first button is clicked, I will see the four buttons.

Here's my sample class:

class buttons
{
 public String label;
 public boolean hidden=false;

 public void hide()
 {
   hidden=true;
 }

 public void unhide()
 {
   hidden=false;
 }
 public void display()
 { // if (!hidden) draw the button}
}

I create 5 buttons b0-b4 and call b1.hide() ... and b4.hide().
In the code that is executed when b0 is pressed I run b1.unhide() ... b4.unhide(). Just make sure when a button is hidden(hidden=true), it doesn't display and does nothing even if it's pressed. Good luck.

In draw() I call b0.display() ... b4.display().