Gnu Radio Flowgraph

I need flowgraph in gnu radio companion which does the following: (1) Generate the phase difference of sine wave and send out the two sine waves and the phase difference of the two waves simultaneously with using only of a single HACKRF. (2) Receive the above sine waves and generate the phase difference of the received waves. Then take the difference of the phase difference at the sent-point and the phase difference at the received-point. The second section will only use a single HACKR ( Different from the HACKRF for sending the signals). The difference should be displayed on a number sink. If you have two HACKRF. the output in the number sink should remain constant if the distance between the two HACKRF is constant and changes as the distance between them is changed.