Im trying to get the arrows to control the box's, I had the boxes -- and ++ left to right, But when I try to make the rows change numbers, I get a void token.  Can anyone help me?  Its my first week wtih processing!

int numSquares = 5;
int squareSize = 25;
int rowSize = 5;

void setup() {
  size(500,500);
  noStroke();
  fill(255,255,255);
}

void draw() {
  background(0);
  for(int x=0;x<numSquares; x++) {
    translate(squareSize+3,0);
    rect(0,0,25,25);
  }
  background(0);
  for(int y=0;y<rowsSize; y++) {
    translate(squareSize+3,0);
    rect(0,0,25,25);
  }

  void keyPressed() {

    if(keyCode==UP) {
      numSquares++;
    }
    if(keyCode==DOWN) {
      numSquares--;
    }
    if(keyCode==LEFT) {
      rowSize++;
    }
    if(keyCode==RIGHT) {
      rowSize++;
    }