Processing boolean starter code

//Declare the x variable here so it can be used
//it will be used to keep track of the x-position of the ellipse
int x;

//This setup function occurs once at the very beginning of the program
void setup(){
  size(300,300);
  x = 5;
}

//This draw function is called many times a second
void draw(){
  background(0);
  fill(128,128,128);
  ellipse(x, 150, 50, 50);
  x++;
}