## Two Sets of Vertices

Once again, we ask the question, "What are we drawing?" And once again, the answer is vertices. This time, though, there are two sets of vertices hence two objects.

```117                 var vertices       = [
118                                               -1.0, -1.0, 0.0,
119                                                1.0,  0.0, 0.0, 1.0,
120                                                1.0, -1.0, 0.0,
121                                                0.0,  1.0, 0.0, 1.0,
122                                                0.0,  1.0, 0.0,
123                                                0.0,  0.0, 1.0, 1.0
124                                             ];
125
126                 // And more of almost the same, but z=0.5.
127                 var moreVertices   =  [
128                                                     -1.0, -1.0,  0.5,
129                                                      0.0,  0.0,  1.0, 1.0,
130                                                      1.0, -1.0,  0.5,
131                                                      0.0,  1.0,  0.0, 1.0,
132                                                      0.0,  1.0,  0.5,
133                                                      1.0,  0.0,  0.0, 1.0
134                                                   ];
```
(0,1) (-1,-1) (1,-1)

### Notes

Now, we pay attention to the third, z, coordinate. The first triangle remains at z=0

```          (-1,-1,0)  (1,-1,0)  (0,1,0)
```

The second set of vertices is at z=0.5.

```          (-1,-1,.5) (1,-1,.5) (0,1,.5)
```