I have a redcat racing eathquake 3.5
Have problems with setting remote have no clue how to set up the buttons
need some help with the setting an the green led blinks
please help me with this

Do you have a manual with you? It should help you out.

If you don't have the manual, try googling the Tx model and look for a manual.

If that doesn't help, put up a picture of your Tx and if one of the members can identify it, they can help you out.