text: class Link {
  
      constructor (bodyA,bodyB){
          var lastLink = bodyA.body.bodies.length - 2 
          this.link = Constraint.create ({
              bodyA:bodyA.body.bodies[lastLink],
              bodyB:bodyB.body,
              stiffness:0.5,
              length:10
          })
          World.add(world,this.link);
      }
  }