SimpleButton.pde

//coordinates of the button/rectangle
float x = 100;
float y = 50;
float w = 150;
float h = 80;
//boolean that will become true when button pressed
boolean mpress = false;
void setup(){
 size(500,500);
}

void draw(){
 background(255);
 fill(255,0,0);
 if(mpress){//change color if button pressed
  fill(0,0,255);
 }
 //draw rectangle
 rect(x,y,w,h);
 
 
}


void mousePressed(){
//check to see if you clicked mouse in the rectangle
  if(mouseX>x && mouseX <x+w && mouseY>y && mouseY <y+h){
       println("The mouse is pressed and over the button");
       mpress=true;
       //do stuff 
  }
}