erer.resize(spine.ResizeMode.Expand);
                canvas.clear(0.2, 0.2, 0.2, 1);

                renderer.begin();
                renderer.drawSkeleton(this.skeleton, true);

                // Draw a circle with a radius of 20 pixels around each draggable bone
                let boneColor = new spine.Color(1, 0, 0, 0.5);
                let selectedBoneColor = new spine.Color(0, 1, 0, 0.5);
                for (let bone of this.draggableBones) {
                    renderer.circle(true, bone.worldX