//Animate ball

//variables
boolean button = false;		//button state

int x = 25;
int y = 25;
int w = 50;
int h = 35;

int ball_x = 100;
int max_x = 150;
int speed = 5;

float pressed = 255;
float unpressed = 0;

//set ip
void setup() {
  size(480, 270); 
}

void draw() {
  // The button is pressed if (mouseX,mouseY) is inside the rectangle and mousePressed is true.
  if (mouseX > x && mouseX < x+w && mouseY > y && mouseY < y+h && mousePressed) {
    button = true; 
  } else {
    button = false;
  }

 if (button) {
    background(pressed);
    stroke(0);
	
	//button is pressed, add speed to ball_x until max_x
	while(ball_x < max_x){
		if (!(ball_x > width) || (ball_x < 0)) {
			// If the object is not on either edge, 
			ball_x = ball_x + speed;
		}
	}
	
  } else {
    background(unpressed);
    stroke(255);
	
	//button is not pressed, reset ball_x
	for (int i = max_x; i >= 100; i -= speed) { 
		ball_x = i;
	}
  }
  
  fill(175);
  rect(x,y,w,h);
  
  // Display circle at ball_x location
  stroke(0);
  fill(175);
  ellipse(ball_x, 100, 32, 32);
}