AnimationTree Blend3

Godot Version

godot-4.3 stable

Hello!

I would like to ask for a little help.
How can I make it so that when the code in the “else:” part is run, it returns to the basic position? I mean exactly:

“$AnimationTree.set(“parameters/Pindad_G2_Pistóly_Kezeles/blend_amount”, -1)”

After this has run, change it yourself to “$AnimationTree.set(“parameters/Pindad_G2_Pistóly_Kezeles/blend_amount”, 0)”.
The full code looks like this:

func _FEGYVER_KEZELES() → void:

if Input.is_action_just_pressed("Fegyver_1"):
	
	if PINDAD_G2 != true and ZSEBLAMPA != true:
		$AnimationTree.set("parameters/Pindad_G2_Pisztoly_Kezeles/blend_amount", 1)
		$AnimationTree.set("parameters/TimeSeek 4/seek_request", 0)
		PINDAD_G2 = true
	else:
		$AnimationTree.set("parameters/Pindad_G2_Pisztoly_Kezeles/blend_amount", -1)
		$AnimationTree.set("parameters/TimeSeek 5/seek_request", 0) 
		PINDAD_G2 = false

Thank you in advance for your help.