Player Controller

void FixedUpdate()
    {
        moveInput = Input.GetAxisRaw("Horizontal");
        rb.velocity = new Vector2(moveInput * runSpeed, rb.velocity.y);
        spriteRenderer.flipX = false;

        if (Physics2D.Linecast(transform.position, groundCheck.position, 1 << LayerMask.NameToLayer("Ground")) ||
           (Physics2D.Linecast(transform.position, groundCheckR.position, 1 << LayerMask.NameToLayer("Ground"))) ||
           (Physics2D.Linecast(transform.position, groundCheckL.position, 1 << LayerMask.NameToLayer("Ground"))))
        {
            isGrounded = true;
        }
        else
        {
            isGrounded = false;
            if (spriteRenderer.flipX == false)
            {
                animator.Play("PlayerJump");
                spriteRenderer.flipX = false;
            }
            else if (spriteRenderer.flipX == true)
            {
                animator.Play("PlayerJump");
                spriteRenderer.flipX = true;
            }
        }

        if (moveInput = 0)
        {
            if (isGrounded)
            {
                spriteRenderer.flipX = false;
                animator.Play("Player_Run");

            }
            else
            {
                spriteRenderer.flipX = false;
            }


        }
        else if (moveInput = 0)
        {
            if (isGrounded)
            {
                animator.Play("Player_Run");
                spriteRenderer.flipX = true;            }
            else
            {
                spriteRenderer.flipX = true;
            }
        }
        else
        {
            if (isGrounded && moveInput == 0 && !spriteRenderer.flipX)
            {
                animator.Play("Player_Idle");

            }
            else if (isGrounded && moveInput == 0 && spriteRenderer.flipX)
            {
                animator.Play("Player_Idle");
                spriteRenderer.flipX = true;
            }
            rb.velocity = new Vector2(0, rb.velocity.y);
        }