Zoog zoog;

void setup(){
  size(200,200);
  smooth();
  zoog = new Zoog(100,125,60,60,16);
}

void draw(){
  background(255);
  float factor = constrain(mouseX/10,0,5);
  zoog.jiggle(factor);
  zoog.display();
}

class Zoog{
  float x,y,w,h, eyeSize;
  Zoog(float tempX, float tempY, float tempW, float tempH, float tempEyeSize){
  x = tempX;
  y = tempY;
  w = tempW;
  h = tempH;
  eyeSize = tempEyeSize;
}

void jiggle(float speed){
  x = x + random(-1,1)*speed;
  y = y + random(-1,1)*speed;
  
  x = constrain(x,0,width);
  y = constrain(y,0,height);
}  
  void display(){
    ellipseMode(CENTER);
    rectMode(CENTER);
    
    for( float i = y - h/3; i < y + h/2; i += 10){
      stroke(0);
      line(x-w/4,i,x+w/4,i);
    }
    
    stroke(0);
    fill(175);
    rect(x,y,w/6,h);
    
    stroke(0);
    fill(255);
    ellipse(x,y-h,w,h);
    
    fill(0);
    ellipse(x-w/3,y-h,eyeSize,eyeSize*2);
    ellipse(x+w/3,y-h,eyeSize,eyeSize*2);
    
    stroke(0);
    line(x-w/12,y+h/12,x-w/4,y+h/2+10);
    line(x+w/12,y+h/12,x+w/4,y+h/2+10);
  }
}