this.y = height/2;

  this.x = width/2  ;

  this.horse= images;

  this.gravity= 0.9;

  this.lift =-20   ; 

  this.velocity =0  ; 

  this.index = 0;

  this.show = function(){

   // fill(255);

   // ellipse(this.x, this.y, 32,32);

    image(this.horse[this.index],this.x,height/2-50);

     this.index= (this.index+1)% this.horse.length;

     image (this.horse, this.x, this.y, 32,32  );

  }

  this.up =function (){

      this.velocity += this.lift;  

   //this.x = this.x-this.lift;    

  }

  this.update = function (){

    this.velocity +=this.gravity;

    //this.velocity *=0.9; 

    this.y += this.velocity; 

    if(this.y> height-16){

      this.y= height-16; 

      this.velocity = 0; 

       }

    if(this.y>   300){

      this.y= 300;  

      this.velocity = 0 ; 

       } 

  }

}