/*
  In this example, a circle with random color is drawn whenever
  the mouse is pressed, with the size of the circle depending
  on the length of time that the mouse is pressed.
*/

int r, x, y;

// This function is executed only once, at the very beginning
void setup() {
  size(500,400);
  background(255);
  fill(128, 128, 255);
}


// This function is repeatedly call in an implicit loop.
// A single call is responsible for drawing a single frame.
void draw() {
  if (r > 0) {    // mouse currently pressed
    r++;
    ellipse(x, y, r, r);

  }
}

void mousePressed() {
  fill(random(255),random(255),random(255));
  r = 1;
  x = mouseX;
  y = mouseY;
}

void mouseReleased() {
  r = 0;
}