       container: document.getElementById('multitarget-references'),
          options: {
            size: 3,
            respondsToMouse: true
          },
          targets: [
            {
              type: ParticleSaga.ModelTarget,
              url: './models/helmet.json',
              container: document.getElementById('multitarget-reference-1'),
              options: {
                scale: 40,
                color: {
                  r: 0.8,
                  g: 1,
                  b: 1
   