void draw()
{
  background(128);
  fill( 255 * int(key=='1') * int(keyPressed));
  rect(0, 0, width/5, height);
  fill( 255 * int(key=='2') * int(keyPressed));
  rect(width/5, 0, width/5, height);
  fill( 255 * int(key=='3') * int(keyPressed));
  rect(2*width/5, 0, width/5, height);
  fill( 255 * int(key=='4') * int(keyPressed));
  rect(3*width/5, 0, width/5, height);
  fill( 255 * int(key=='5') * int(keyPressed));
  rect(4*width/5, 0, width/5, height);
}