Quadrant

void setup(){
 size(500,500);
}
  void draw(){
 
  noStroke();
  textSize(25);
  fill(255,0,0);
  rect(0,0,250,250);
  fill(0,255,0);
  rect(250,0,250,250);
  fill(0,0,255);
  rect(0,250,250,250);
  fill(0);
  rect(250,250,250,250);
  fill(255,0,0);
  stroke(0);
  strokeWeight(5);
  line(0,250,500,250);
  line(250,0,250,500);
  if(mouseX>=250&&mouseX<=500&&mouseY>=0&&mouseY<=250){
    text(" Quadrant I ",300,130);
  } 
  fill(0,255,0);
  if(mouseX>=0&&mouseX<=250&&mouseY>=0&&mouseY<=250){
    text(" Quadrant II ",50,130);
  }
  fill(255,255,0);
  if(mouseX>=0&&mouseX<=250&&mouseY>=250&&mouseY<=500){
    text(" Quadrant III ",50,380);
  }
  fill(255);
  if(mouseX>=250&&mouseX<=500&&mouseY>=250&&mouseY<=500){
    text(" Quadrant IV ",300,380);
  }
}