Property({
          color: DC.Color.RED,
          speed: 5,
        }),
        clampToGround: true,
      })

      let polyline1 = new DC.Polyline(' -75, 30;-75, 35').setStyle({
        width: 5,
        material: new DC.PolylineFlowMaterialProperty({
          color: DC.Color.ORANGE,
          speed: 5,
        }),
        clampToGround: true,
      })

      let polyline2 = new DC.Polyline('-80, 35; -80, 30').setStyle({
        width: 5,
        material: new DC.PolylineFlowMaterialProperty({
        