// Draw Zoog. This version of Zoog follows
// the mouse pointer. The draw() method
// repeatedly redraws Zoog centered over
// the location onscreen where the cursor
// points.

int headRed = 255;
int headGreen = 255;
int headBlue = 255;

void setup ()
{
  size(300,300);

  // Draw ellipses and rectangles by specifying their center and dimensions
  ellipseMode(CENTER);
  rectMode(CENTER);

  smooth();
}

void draw ()
{
  background(175, 190, 75);

  
  // Draw Zoog's body
  stroke(0);
  fill(150);
  rect(mouseX,mouseY,20,100);



  // Draw Zoog's head
  fill(headRed, headGreen, headBlue);
  ellipse(mouseX,mouseY-30,60,60);

  // Draw Zoog's eyes
  fill(0);
  ellipse(mouseX-19,mouseY-30,16,32);
  ellipse(mouseX+19,mouseY-30,16,32);

  // Draw Zoog's legs
  stroke(0);
  line(mouseX-10,mouseY+50,mouseX-20,mouseY+60);
  line(mouseX+10,mouseY+50,mouseX+20,mouseY+60);
  
  // Whenever the user presses the (left) mouse
  // button, Zoog's head changes color. If the
  // user releases the button, Zoog's head
  // slowly fades to white.
  //
  // mousePressed() (with the parentheses) is a
  // function that is called whenever the user
  // clicks on the mouse button. mousePressed
  // (without the parentheses) is a variable that
  // is true only if the user is holding down the
  // mouse button
  if (mousePressed == false)
  {
    // Pure white, in RGB color, means that red,
    // green, and blue are all 255. If we add 1 to
    // each value repeatedly, all three will 
    // eventually reach 1.
    headRed = headRed + 1;
    headGreen = headGreen + 1;
    headBlue = headBlue + 1;
  }
}

void mousePressed ()
{
  // When mouse is clicked, change Zoog's head
  // to a random color.
  //
  // The random() method takes an int n as its
  // argument (input). It returns a random # in
  // the range 0-(n-1) (for example, random(5)
  // returns a value between 0 and 4 inclusive).
  // random() returns a floating-point value, so
  // we have to cast it to an int before we can 
  // assign it as a color component.
  headRed = int(random(256));
  headGreen = int(random(256));
  headBlue = int(random(256));
}