//if3.pde 
//note that when X>200, it is also true that X>100
void setup() {
  size( 500, 500 );
  smooth();
}

void draw() {

  if ( mouseX > 200 ) 
  {
    background( 255, 0, 0 );
  } 

  if ( mouseX > 100 ) 
  {
    background( 0, 0, 255 );
  }

}