Color Change Mouse Over - OpenProcessing

mySketch
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/*-----------------------------
Color Change Mouse Over
Color changes when you roll the mouse over.
​
Created 30 January 2017
By Tamara Sabbagh
tamara.sabbagh@gmail.com
​
https://www.openprocessing.org/sketch/403031
-----------------------------*/
​
void setup () {
  size(500, 500);
  
}
​
int rectColor;
color blue = color(0, 0, 255);
color red = color(255, 0, 0);
​
void draw(){
  
  background(255);
  fill(rectColor);
  rectMode (CENTER);
  rect (height/2, width/2,250, 250);
  if (mouseX >125 && mouseX < 375 && mouseY >  125 && mouseY <375){
    rectColor = red;
​
  } else {
    rectColor= blue;
  }
}