Adding footstep sound effect by pressing and holding a key

Hello Everyone

im trying to find a way to add a sound effect of footstep to my game. im using an invisible character so i want it to function in a way that when ever i press the W the sound effect keep playing and looping until i release the button.

Thanks in advance

Create Sound Cue that picks foot sound in harmonious way and put loop node in beginning of a cue.