int x = 90;

void draw() {
  noStroke();
  rect(x, 10, 3, 80);
}

void keyPressed() {
  if (keyCode == BACKSPACE) {
    x = x - 5;
  }
}

color fillVal = color(126);

void draw() {
  fill(fillVal);
  rect(25, 25, 50, 50);
}

void keyPressed() {
  if (key == CODED) {
    if (keyCode == UP) {
      fillVal = 255;
    } else if (keyCode == DOWN) {
      fillVal = 0;
    } 
  } else {
    fillVal = 126;
  }
}