How can I extend a Matrix as putting a new matrix into each element of main matrix?

I have a 3x3 main matrix (A) and I have also a 2x2 matrix (B). I want to put matrix B into each element of matrix A. I mean end of the algorithm I have a 6x6 matrix (new A).

The algoritm like "if there is a connection between line 1 and line 2, put matrix B*constant to new A(1,2)". How can I do that?

A=[0 0 0;0 0 0;0 0 0]; B=[1 1;1 1]; new A=[1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1]