Button Rave - OpenProcessing

mySketch
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/*-----------------------------
Button Rave
Click on the button
​
Created 2-5-17
Renee Cheng
cheng.835
​
https://www.openprocessing.org/sketch/404550
-----------------------------*/
void setup()
{
 background(125);
 size(500,500);
}
​
void draw()
{
  int center = 250;
  rectMode(CENTER);
  fill(0, 120, 75);
  rect(center,center,50,50);
  
  if (mousePressed)
  {
    if((mouseX >center - 25) && (mouseX <center + 25 ))
    {
      if((mouseY>center - 25) && (mouseY <center + 25))
      {
       buttonRave();
      }
    }
  }
}
​
void buttonRave()
{
  int x;
  int y = 10;
  for(y=10; y<490; y=y+10)
  {
    for(x=10; x<490; x=x+10)
    {
      fill((random(255)),(random(255)),(random(255)));
      ellipse(x,y,10,10);
    }
  }
}