Meshing a Square into 8 equal triangles

Hi,

How would you go about meshing a square into 8 equal spaced triangles?

I managed to go into free triangular 1 --> distribution
This lets me set the boundaries on the mesh. When i set it to 1, i get 4 triangles, but I need to cut those triangles in half again.
When I set it to 2, I get too many triangles. And even then it is not equally spaced.

Thanks,
David