Setting size of a cube

I need some help there! I have this code:

And how You can see (in attached file named graph.png), there is mirror graph (by axis x) made of cubes. Although I want to make graph made of cubes, where the cubes are not mirrores! I´d like to have the bars aligned to axis x. It means, their base must to stand on plane[x,0]. Any ideas, how I can do it? I´d like to it i this way:

link text

Offset the y position with half the y scale to get the box to stand on the axis.

go.transform.position = new Vector3(0.01f * i, y * 0.5f, 0f);