//this bubble class has changing color built in
class BubbleX { 
  color c; //variables
  float xpos;
  float ypos;
  float yspeed;
  float diam;
  float xvar;
  

  BubbleX(float tempXpos, float tempYpos, float tempYspeed) { //constructor
    xpos=tempXpos;
    ypos=tempYpos;
    yspeed=tempYspeed;
      }
  void display () { //function 1. displays the bubble
  float r=random(255);
  float g=random(255);
  float b=random(255);
  float a=random(0,255);
  diam=random(20,100);
  //c=color(r,g,b,a); 
  noStroke();
  fill(r,g,b,a);
  ellipse(xpos,ypos,diam,diam);
    }

  void move() { //function 2. makes the bubbles rise and move side to side
    xvar=random(-10,10);
    xpos=xpos-xvar;
    if (xpos<=diam/2)
    xpos=xpos+20;
    if (xpos>width)
    xpos=width-20;
    ypos=ypos-yspeed;
    if (ypos<=diam/2) {
      ypos=height;
    } //end of if
  }//end of move
}//end of Bubble class