How to configure the 'control' key to work as 'backspace' alone and also to as 'control' when combined with other key in karabiner?

Question

I'm trying to make the control key backspace when pressed alone and also work as left control when combined with another key ( eg I use control h,j,k,l for up down left right), any help? for some reason, it's not working how I designed it.

https://i.stack.imgur.com/2VIud.jpg

expecting: the control key to having multi-functionality with 'backspace' and 'control'

Answer 1

I figured it out and made 2 versions 'control' had to be substituted for 'left_control':

{
                    "description": "control is backspace when pressed alone",
                    "manipulators": [
                        {
                            "from": {
                                "key_code": "left_control",
                                "modifiers": {
                                    "optional": [
                                        "any"
                                    ]
                                }
                            },
                            "parameters": {
                                "basic.to_if_alone_timeout_milliseconds": 300,
                                "basic.to_if_held_down_threshold_milliseconds":0
                            },
                            "to_if_alone": [
                                {
                                    "key_code": "delete_or_backspace"
                                }
                            ],
                            "to_if_held_down": [
                                {
                                    "key_code": "left_control"
                                }
                            ],
                            "type": "basic"
                        }
                    ]
                }




               {
                        "description": "Change control to control if pressed with other keys, to backspace if pressed alone.",
                        "manipulators": [
                            {
                                "type": "basic",
                                "from": {
                                    "key_code": "left_control",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_control"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "key_code": "delete_or_backspace"
                                    }
                                ]
                            }
                        ]
                    }