            let lights = [
                {
                    position: vec3.fromValues(0, 1, 0.5),
                    color:    vec3.fromValues(0.8, 0.0, 0.0),
                    uniforms: null,
                    drawCall: null
                },
                {
                    position: vec3.fromValues(1, 1, 0.5),
                    color:    vec3.fromValues(0.0, 0.0, 0.8),
                    uniforms: null,
                    drawCall: null
                },
                {
           