constructor(x,y,corona,ix,iy){

    this.radius = 35;

    this.x = x;

    this.y = y;

    this.corona = corona;

    this.colour = color(239,120,255);

    this.ix = ix;

    this.iy = iy;

  }

  draw(){

   if(this.corona === "positive"){

      this.colour = color(255, 0, 0);

   }else{

      this.colour = color(239,120,255);

   }

   noStroke();

   fill(this.colour);

   ellipse(this.x,this.y,this.radius);

  }

  infect(obj){

    if(dist(this.x,this.y,obj.x,obj.y) <= this.radius && this.corona === "positive" || obj.corona === "positive"){

       this.corona = "positive";

       obj.corona = "positive";

    }

  }

​

  move(){

    this.x += this.ix;

    this.y += this.iy;

​

    if(this.ix > 5){

       this.ix = 5;

    }

    if(this.ix < -5){

       this.ix = -5;

    }

    if(this.iy > 5){

       this.iy = 5;

    }

    if(this.iy < -5){

       this.iy = -5;

    }

  }

​

  colWall(){

    if (this.x + this.radius > width) {

      this.x = width-this.radius;

      this.ix *= -1;

    } else if (this.x - this.radius < 0) {

      this.x = this.radius;

      this.ix *= -1;

    }

    if (this.y + this.radius > height) {

      this.y = height-this.radius;

      this.iy *= -1;

    } else if (this.y - this.radius < 0) {

      this.y = this.radius;

      this.iy *= -1;

    }

  }

​

  colBall() {

      for (let i = 0; i < 15; i++) {

        let dx = balls[i].x - this.x;

        let dy = balls[i].y - this.y;

        let distance = sqrt(dx * dx + dy * dy);

        let minDist = balls[i].radius/2 + this.radius/2 + 1;

        if (distance < minDist) {

          let angle = atan2(dy, dx);

          let targetX = this.x + cos(angle) * minDist;

          let targetY = this.y + sin(angle) * minDist;

          let ax = (targetX - balls[i].x) * 0.1;

          let ay = (targetY - balls[i].y) * 0.1;

          this.ix -= ax;

          this.iy -= ay;

          balls[i].ix += ax;

          balls[i].iy += ay;

        }

      }

  }

}