Thanks for the answers guys, few questions:
I only have two buttons on Tx as an option. I am sorry if I failed to explain that the process has to work with one button only, i.e. if button 1 is pressed relay one should activate and when it is released relay should stop, same with the button 2 and relay 2.

I added gpio=0 at after start to make sure the relays are off if no valid signal is comming otherwise before that statement relay was just left on.