Hello, Jayanam

extends KinematicBody

var speed = 20
var gravity = -9.8
var direction = Vector3(0, 0, 0)
var velocity = Vector3(0, 0, 0)
var is_moving
var character

func _ready():
    character = get_node(".")

func _physics_process(delta):
    jump()
    movement(delta)

func movement(delta):
    direction = Vector3(0, 0, 0)
    is_moving = false
    if Input.is_action_pressed("W"):
        direction += transform.basis.z
        is_moving = true
    if Input.is_action_pressed("S"):
        direction -= transform.basis.z
        is_moving = true
    if Input.is_action_pressed("A"):
        direction += transform.basis.x
        is_moving = true
    if Input.is_action_pressed("D"):
        direction -= transform.basis.x
        is_moving = true


    direction = direction.normalized()

    direction = direction * speed

    velocity.x = direction.x
    velocity.z = direction.z

    velocity.y += gravity * delta

    # Your Code
    if is_moving:

        var angle = atan2(velocity.x, velocity.y)

        var char_rot = character.get_rotation()

        char_rot.y = angle

        character.set_rotation(char_rot)

        # Your Code

    velocity = move_and_slide(velocity, Vector3(0, 1, 0))


func jump():
    if Input.is_action_just_pressed("jump") and is_on_floor():
        velocity.y = 16