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You can use AnimationPlayer's "Add Track -> Call Method Track" in animation API ,

It will excue the the func you set after "attack1" finished .

Maybe use API to connect the timeout function in parent node?

If you want to use connect() , maybe try:

myTime.connect("timeout", self, xxx)

func xxx():
// do some things

Maybe try this plugin?
This can convert AnimtedSprite's animation frames in an AnimationPlayer.

GitHub - poohcom1/godot-animated-sprite-2-player: A Godot addon to convert animated sprite frames to animations in an animation player.

A Godot addon to convert animated sprite frames to animations in an animation player. - poohcom1/godot-animated-sprite-2-player

GitHub (github.com)