How do I put animation, only once when the start button is pressed

Hey there, I wanted to ask you professionals that how do I put an animation only once after the player presses on start button, Like, IN SUBWAY SURFERS, when the player taps on the screen, an animation of the guard and dog appears and also of jake, and then the player starts running, I wanted to know that how can i do the same?!
WAITING FOR YOUR SMART ANSWERS…