Null pointer error in thread

Processing Coding Questions
46

Ok gotcha so it can only accept regular canvas commands and nothing else. At least from what I understand.

if I change the code to the following

public void draw(){
    background(50);
    fill(0);
    ellipse(0,0,width,height);
    //display();
      fill(255);
    text("hello",50,50);
    //System.out.println(count);
  };

image

however add anything else and it just goes wonky.